It's cold out there -- and it's only going to get colder. Since it's hard to get a good night's sleep when it's too chilly to relax, the Lifehacker team assembled their best strategies for making the warmest bed possible.

You have a fever, runny nose, and can't get out of bed. It must be the flu, right? Not necessarily.

That sneeze in the elevator. The snot somebody wiped on that handrail an hour ago. Your coworker who won't stay home, breathing right next to you. Cold and flu viruses are everywhere. And if you're coming down with something, you're spreading them too.

Winter is here, and if you commute by bike or you just refuse to let the colder weather ruin your fun, there are a few things you can do to make cycling in the winter less terrible. Global Cycling Network walks you through a few tips in the video above.

For some, winter is a magical time of year. For others like me, it's a gloomy, cold, darkness you just have to wait out. But there's a better way to get through winter. A mindset that involves embracing the unique aspects of the winter months. Enter the Danish concept of "hygge".

Flu shots work, and are a smart way to reduce the chances that you'll end up sick this winter. But that's not the impression you might get if you listen to the rumour mill. Flu shot myths abound, and it's time to put the biggest ones to rest.

NSW is currently shivering its way through one of the worst cold snaps in memory. Last night, Sydney temperatures dropped to 10 degrees or under - which was a rude shock after weeks of balmy Autumn weather. While we haven't reached frostbite season yet, it can never hurt to be prepared. This infographic explains what to do when Jack Frost tries to bit your nose off.

Sleeping bags are designed to retain the heat generated by your body while you sleep to keep you warm. If you're camping in a chilly environment and the bag by itself isn't quite cutting it, you can generate some heat the old-fashioned way -- with a little exercise before you sleep.

Video: If you want to get rid of a cough, it's natural to reach for something labelled "cough medicine". But the ingredients in cough medicines probably don't work as well as you think they do. This video explains the sad situation.

Common sense says you should never workout when you're not feeling well, but there are a few exceptions. If you're worried your illness is taking you off track of your fitness goals, here's what you need to know.

When you or your child is sick and all you care about is relief, you'll perk up at any promise a pill bottle makes. But some of those packages hold no medicine at all, just homeopathic "remedies." Australians spend around $1.2 billion per year on non-prescription vitamins, herbal remedies and natural medicines. Their makers are legally allowed to lie to you and say these products can improve your health or provide relief to ailments, even though they absolutely definitely do not.

Running in the cold isn't as tough as it looks. With the right gear, your fingers and ears can stay toasty while you jog through a winter wonderland.

The bitter cold and short days of winter can take a toll on your mood, and even lead to something more serious known as Seasonal Affective Disorder. To beat back the winter blues and keep in high spirits, a simple shift in mindset is all you need.

This man clearly harbours no qualms about the cold. The native Norwegian achieved viral renown for skating on and swimming in Norway's Lake Goksjo almost entirely nude, save for a pair of Speedos and a wreath of ice worn round his neck. We know what you're thinking: How I can I be like this man? Let us show you the way.

Your options are to blow or to snort 'n swallow. Unless you prefer to let the snot just sort of dribble out and pool in your philtrum, giving your upper lip a damp, sickly glisten. Which, no -- what are you, seven? It's time you learned to get rid of mucus like a well-informed adult.

We all swear by something that we know probably doesn't work. Maybe it's vitamin C when everyone at work has a cold, or #bootea while we diet, or compression socks while we run. "Even if it doesn't work, what's the harm?" we tell ourselves. The truth is, it's not harmless, and we're only fooling ourselves.

If you're about to fly somewhere, you're probably dreading the possibility that you'll catch a bug along the way. And with good reason: Many people come down with something nasty in the days following an aeroplane flight. Why does this happen, and how can you keep yourself from getting sick?