Some words and phrases sound like they should be interchangeable, or are so similar it's hard to tell the difference between. But in the complicated world of English grammar, even these subtle differences can change the entire meaning of a word. Here are 12 common words you need to be careful about mixing up.

Unless you're flying first or business class, airplane coffee is generally not the best quality cup you'll ever have - but it's still a nice little comfort in what can be an exhausting way to travel. Some airlines serve better coffee than others - but do you know what brands your favourite airlines serve? Here's a list of 44 airlines across the world, and what kind of coffee they're pouring into your little paper cup.

Who's sitting at their desk right now, trying not to slip into an unplanned power nap? If this is a common occurrence from you, you may need to change up your habits to avoid that midday slump. Here's what you should be doing.

If you want to know how your spending levels compare to the average Australian, you now have the answer.

Lifehacker AU is never one to shy away from doling out handy Microsoft Excel spreadsheet tips. Chances are you've had to deal in spreadsheets for as long as you've been able to rest your hands on a keyboard. Here's some Excel techniques that will come in handy for any one strapped to an office desk throughout the day.

It can be difficult to grasp how long fifty years are without context. So when you hear that the number gets filed away as "a long time" which isn't helpful at all if you've also filed away a millennium as "a long time". Being told a styrofoam cup takes fifty years to decompose is easily forgettable. Being told that a styrofoam cup takes the lifetime of an African elephant to decompose is a fun little bit of trivia.

At the end of a long day you're tired, you're lethargic, you just want to fall into the warm embrace of a couch and flick on the sports channel. Or National Geographic. Or that one with all the Real Housewives programs on it. You want to feel happy.

The key to feeling good at home isn't just about how much TV you can binge watch from the couch - it's about how you design every room of your house.

This infographic has ten pictures of puppies. It also breaks down the top ten most popular dog breeds but there's ten pictures of puppies.

Netflix has become synonymous with streaming movies and TV shows easily and cheaply, but Australians have access to a wide range of services that do the same thing: Stan, Amazon Prime Video and Foxtel Now are the obvious ones, but there's also ABC's iView and SBS OnDemand - two options that let you watch for free. When you vie for the Streaming Throne, you either win or you die. There is no middle ground.

So which service is King?

Ever wanted to hang off a big hog with your 24-inch pythons like our mate Hulk Hogan, brother? Of course you have, brother. If you've ever wondered about which exercises you need to do to grow those biceps, triceps and forearms - look no further, brother. Here are the best exercises to master those arm muscles.

Ever since you learnt what was between your legs, you probably had questions. Those questions inevitably lead to answers. It's likely not all of those answers are grounded in actual fact. Now it's time to bust all those myths you've heard about the birds and the bees - with science!

There have been 18 movies in the Marvel Cinematic Universe, stretching all the way back to 2008's Iron Man. The all-consuming Marvel juggernaut begins to reach its conclusion with Infinity War, which sees a big, bald purple man take on basically every single actor in Hollywood for control of the universe. If you can't remember everything that's happened up to this point - this graphic is the perfect way to remind yourself.

You're probably aware of Newton's Laws of Thermodynamics, but are you aware of the physical and scientific laws that govern our interactions on the internet? No? Then you can educate yourself with this infographic.

Managing Editor of Lifehacker, Mark Serrels, has probably put more oats into his body than should be physically possible. He swears by the stuff. I always thought that the preparation time was just a little too much for me. However, after reading this guide, I am beginning to consider oats as great breakfast option.

With the release of Stranger Things season 2 just days away, plenty of us are PREPARING TO BINGE.

It's interesting how the idea of 'binging' has just become part of our entertainment lexicon -- and it's growing dramatically. Binge watching has grown 20 fold over the last four years.

On the back of the news that Victoria will be banning plastic shopping bags, I wondered how much plastic is actually in the ocean. I always hear big, crazy numbers and I've certainly seen the pictures but what is the reality? The science? How does it affect ocean life?

This infographic explains.

In the era of 'fake news' and 'anti-vaxxers', being able to detect the difference between Good Science and Bad Science is critical to see through the nonsense. This 12 point guide is an excellent overview of how you can spot any untruths that you might see floating around your social media pages, you know, like how injecting bicarb soda cures cancer (it doesn't).

Baby animals are the best kind of animals. They're more sleepy, more needy and infinitely more adorable than their adult counterparts. They make you happy. This impressively designed infographic is cute and informative, and it is absolutely necessary today.

You probably don't think of running as a dangerous exercise, but it's an intense activity and injuries are common, especially for beginners who push themselves too hard. This graphic from Strength Running shows how you can prevent running injuries.