If anyone knows a thing or two about personal finance, it's those who earned and saved enough money to retire early. I recently spoke to early retirees with a net worth of at least seven figures. Here are seven of their greatest tips and strategies (that you don't need to be an existing millionaire to follow.)
I spoke with - and learned from - many early retirees this year, several of whom retired millionaires. I was always impressed with not just their insightful advice on building wealth but with their perspective on money as a whole.
The best part is that their wisdom doesn't just apply to other hopeful early retirees. Even those saving for a "normal" retirement or a different long-term goal can take their words to the bank.
Since 2019 is going to be the year you finally get your savings in order - right? - we rounded up some of the best tips on saving money that early retirees shared in 2018.
From having a net-worth target goal and saving 20% of your income to investing and letting your money compound, here's what they had to say.
Focus on your spending, not your earnings
Chris Reining, who retired at 37 as a self-made millionaire, finds a difference between "living rich" and "being rich."
He posted a Tweet earlier this year that read: "Living rich: Make $US500k, spend $US500k, don't have two nickels to rub together. Being rich: Make $US100k, spend $US40k, have $US1 million in the bank."
Instead of measuring wealth as figures or material means, he defines rich from a behavioural standpoint.
"When people say they want to be rich, what they're saying is they want to spend like a rich person. They're focusing on earning a big paycheck," Reining told me. "But that's not the definition of being rich. The definition of being rich is having assets generating income that exceed your standard of living."
He continued: "Someone earning $US50,000 a year while they sleep from dividends and investment gains and spending $US40,000 a year - they're rich. I have friends earning half a million, and with private schools, second homes, and expensive lifestyles, they have nothing in their bank account - they're poor. That's why 'rich' has little to do with how big the paycheck is.
"Getting rich, and staying rich, is overwhelmingly a game of living below your means. If you can do that you'll enjoy a freedom that people living rich will never experience."
Put in the hard work and sacrifice to build your first small nest egg.
In a post she wrote for Business Insider, JP Livingston, who retired at 28 with a nest egg of $US2 million and runs the blog The Money Habit, called the difference between having no money and a little money "staggering."
"More money means more options open up to you," she wrote. "Better options. The more money you have means you accelerate faster and faster toward massive wealth. Money begets money, so it's worth the hard work and sacrifice to build that first small nest egg."
For example, she used her accumulated wealth to get a mortgage rate discount as a private client of major banks (a mortgage discount is a benefit of being a private client). To qualify, she had to transfer some buy-and-hold stocks into an account stewarded by the bank.
Those accumulated assets allowed her to get a discount worth $US300,000 over the life of the loan and take advantage of brokerage sign-up bonuses.
"Do everything you can to accumulate that first $US10,000, $US20,000, or $US100,000," she wrote. "It will create a snowball that speeds you toward wealth far faster than you can imagine."
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Earn, save and invest.
In a blog post, John, who doesn't share his full name online, revealed what he learned from them, including the simple strategy they use to build wealth.
"I have had one or two interviewees with some sort of fortunate life event (like working for a startup company that made it big and paid stock options), but almost all of them grew their wealth the old-fashioned way: They earned a lot, saved a ton, and invested for a long time," he wrote.
He added: "They make solid money moves over time and ultimately become wealthy."
It sounds simple - and it is.
"Becoming wealthy is simple - create a gap between earning and spending for many years," he wrote. "A huge inheritance or hot stock tip is not required."
Maximise your credit-card rewards.
Mr. Crazy Kicks, a blogger who retired at 34, previously spoke with Business Insider about what he wished he knew before retiring early.
He said travel hacking is "easy and lucrative," and wished he employed this smart savings strategy earlier.
"We signed up for a travel card and earned a hefty sign-up bonus with our regular spending. A few months later, we used that bonus to fly to Colorado for free and even earned another $US2,400 in travel credit in the process. Since then, we've signed up for dozens of cards and travelled to Spain, Costa Rica, Jamaica, and Grenada - all free.
"In the end, I don't spend much more time earning free miles than I did searching for discounted airfare. Last year alone, we did about $US10,000 in free travel - well worth the time spent managing a few credit cards."
But remember: It's valuable only if you're paying off your credit card balances in full every month.
Get out of your comfort zone to make uncomfortable money decisions.
According to Steve Adcock, who runs the blog Think Save Retire, getting out of your comfort zone can help you make uncomfortable money decisions you're not used to - like cutting back and saving more.
"Spending is an addiction, and people's minds keep planting the seeds of comfort within the decision-making process," he wrote.
"In other words, early retirees make decisions that are in line and supportive of their financial goals and do not let society or friends/family affect their financial situation - even if those decisions are uncomfortable."
Don't forget to invest in yourself.
Carl Jensen, who retired at 43, reflected on his journey to early retirement in a post he wrote for GOBankingRates. In hindsight, he wished he knew that his happiness comes from himself, not from financial independence.
"I was counting on an external event (leaving work) to bring me happiness when I should have been working on it internally the whole time," he wrote. "I now know that happiness needs to come from within.
"Work on yourself now. Find beauty in life every day. Live with meaning, purpose, and intention."
Have a net-worth target goal.
Early retiree Sam Dogen, who runs the blog Financial Samurai, emphasised the importance of having a net-worth target to stick to your financial goals and retirement plan.
"Everybody should have a net-worth target to shoot for by age, work experience, and income," he wrote. "Targets will help you stick to your financial plan and motivate you to do more if you're falling behind.
"Too many people wake up 10 years later and wonder where all their money went. If only they could have a net-worth guide they could print out and stick on their refrigerator to keep them on track."
He used a multiple of gross income based on age and years worked for a guideline to how much you should have saved as you get older. This, he said, will help build momentum after about 10 years in the workforce, and achieving the net-worth targets based on higher multiples will get easier.