In the hallowed words of Kramer on Seinfeld: "RRP" is for suckers! Here are eight proven ways to score a "double whammy" discount - whether you're shopping in-store or online.

The true strength of a relationship isn't tested when circumstances are easy, but when they are dire. Over the weekend, my partner and I embarked on a journey that would test our mettle. Our ability to communicate, compromise, and show patience toward one another is what held us together through the trying ordeal, but one thing is for certain: Going to IKEA with your significant other ain't no joke.

It's an annual tradition for parents all across the country. The Christmas holidays start to wind down. They get a letter from school about their student's enrolment. They start seeing hints of "back to school" at the store. The kids are dressed in clothes that are almost too small and worn from a summer of play. It's time to start thinking about going back to school.

So you're in your brand-new apartment or house. Some of the boxes are still waiting to be unpacked, but you're so excited about making this space into a home that you're spending hours at IKEA comparing couch pillows and loading up shopping carts to see how much everything you might want is going to cost.

The next time your Instagram feeds up an ad, check the brand. Chances are, it's actually a third-party reseller using Insta's algorithm, content marketing and good-old-fashioned arbitrage to get you to buy cheap stuff.

My boyfriend and I are pretty horrible grocery shoppers. We always attempt to hit the grocery store to buy "meals for the week" but that meal planning quickly takes a complicated turn when we end up in discussions on what food might still have available in the house to contribute to that meal.

If, like me, you research every gadget purchase to the Nth degree, it can be super depressing when said product arrives and it's perfect... except for one, tiny thing. Usually that thing escaped detection because it only rears it head once you actually use your new shiny. In my case, it was a set of SoundMagic E10 earphones to replace my busted EarPods. The problem? They vibrate.

When you're in a grocery line that seems to be going nowhere, you shouldn't make the switch to another queue. Unless that cashier just opened up next to you with no waiting, researchers say skipping from one line to another is actually counterproductive.

When you find a bit of mould on food, it might seem like it's OK to salvage some of it because the mould doesn't cover the whole thing. That seems like the logical step, right? It turns out that's not true for a lot of foods, like bread, because the mould can hide deep in the surface where you can't see it.

Website VinylHub catalogues record stores around the world, an increasingly useful tool for crate diggers as vinyl sales keep rising. Launched in 2014 by music database Discogs, Vinyl has identified over 6500 record shops, along with details like hours, storefront photos, and featured genres. Users can "follow" stores and mark which ones they have visited or hope to visit.

Self service checkouts are a great invention. Sure, they may have taken a few jobs away but gone are the days where you have to make idle chit-chat with a not so fresh-faced teen while they slipped groceries into a planet-destroying plastic bag. Now, you can do it all yourself! Scan, bag, pay and leave.

Which means the system is rife for exploitation.

Nobody wants a car that falls apart the moment you drive off the lot, but nobody wants a car that requires nonstop maintenance throughout the course of its life, either. If you're in the market for a new car and hoping to avoid a lemon, these models seem like they will go the distance.

Searching eBay requires faith -- faith that the seller listed their item with the same keywords you'd use to describe what you want. Sometimes you have different ideas of what constitutes "turquoise." Sometimes you have a picture of what you want but don't know the name for a certain style. Well, now that picture is all you need.

IKEA products have a wide variety of interesting names. Some are Swedish words, others are named after places, and some are just made-up names made from mixing other words. This dictionary lists them all.

You spend hours trying on clothes, you spend hundreds (maybe more!) buying those clothes, then you open your closet and, lo and behold, nothing worth wearing. It's a common dilemma and a financially wasteful one, too. Here are some common traps we fall into when we shop and how to get more bang for your buck.

Sifting between the well-priced gems and the scammy junk can be a difficult task when shopping online, so it's no wonder that most of us rely on product reviews to help us narrow down the choices. The most careful of us (read: Me) will even go as far as to see how many reviews something has to help determine how well-established and liked a given item is.

Facebook is on a quest to completely dominate the Internet. With around two billion active users, the social media juggernaut has a strong place when it comes to communications, through Messenger and WhatsApp, as well pretty much everything else in our lives as we share images, through status updates and Instagram, as well other posts we make.

Marketplace is another service they deliver, giving us a place to buy, swap and sell items. And, as Marketplace grows in popularity, Facebook is planning to open the service to retailers.

Amazon's business is booming and a move into Australia is planned, but scams from fraudulent third-party sellers are on the rise. Here's how you can shop safely and avoid buying a big ol' box of nothin'.

A chart or infographic can be the best way to communicate complex topics -- like which tie to where to certain events and how to fix common cooking mistakes. Here are some of the most save or print-worthy food graphics we've shared on Lifehacker.