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From calories to sleep, there always seems to be something we're not doing right. Luckily scientists have looked into this and come up with some helpful advice to keep us happy and healthy.

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Sometimes it can seem like it's impossible to do all the things it takes to be as happy and healthy as you want. I mean, who can sleep enough, exercise enough, drink enough water, and spend enough time with their friends? And that's not even mentioning how many conflicting sources there are about these things. Thankfully, lots of scientists have explored how the way we live our lives can help or hurt, and their studies have revealed that there are plenty of little things you can do if you want to make some changes this year.

First things first: for many people, everything starts with a good night's sleep. After all, if you can't sleep well, that can make it hard to tackle everything else you have lined up in a day. All kinds of things can affect your sleep, from medication to stress, but sometimes you can't sleep well because you just can't get comfortable. If you tend to spend nights tossing and turning, trying to find the right position, well, maybe you can take advantage of the fact that scientists have too, and they've found some solutions.  Here's Olivia with more on the best position for sleeping.

OLIVIA: Every night, when you turn out your light and pull up the covers, there's a good chance you settle into the same sleeping position. If you're like most people, you sleep on your side with your knees tucked up in the fetal position. But, lots of people also sleep on their back, sprawled out on their stomach, or twisted around three pillows and a stuffed animal.

But is one of those positions better than the others? Well, there's a lot of pseudoscience out there. But the real answer is: it depends.

If you're dozing off without a problem, and not waking up with weird aches and pains, your setup is probably okay. But if you have some complaints, the way you sleep could be the issue.

For example, sleeping on your right side seems to aggravate heartburn. None of the sample sizes were huge, but a handful of studies have shown that people lying on their right side after eating high-fat meals had higher levels of acid in their esophagus.

We don't really know why that is. But some scientists think sleeping on that side relaxes the valve connecting your stomach and esophagus. The valve that normally keeps stomach acid where it belongs.

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