Don't just grab another cup of coffee -- get up and move. Do some deep lunges or stretches. It's great for your body and mind. Just 30 minutes of walking five times a week may help keep the blues at bay. And if you can't do those minutes all at once, short bursts help, too.

It can do so many good things for you. Staying hydrated is at the top of the list, but it may also help you lose weight. Another reason to go for H2O? Sugary drinks are linked to obesity and type 2 diabetes. If you aren't a fan of plain water, add flavor with slices of orange, lemon, lime, waterm...

New skills help keep your brain healthy. Sign up for a dance class or a creative writing workshop. Better yet, master a new language. The mental work it takes can slow the signs of aging and may even delay the effects of Alzheimer's disease.