Explore your city/town. You don't have to travel far to find something new. Try going somewhere you normally wouldn't.
Forgive, not because they deserve forgiveness, but because you deserve peace.
Get rid of your frenemies. It's not worth it to spend all your time with people you secretly despise (or secretly despise you.)
Introduce yourself to new people. You never know what saying "hi" may lead to.
Strengthen your ties with your family. It's easy to forget to let our family know we care when we're busy at school. Make it a priority to catch up once in a while.
Pay it forward. Do some good in the world without tweeting about it.
Turn off your iPhone at dinner. Focus in on the people you're with; trust me, it's worth it.
Don't beat yourself up over the small things. Didn't make it to the gym today? Had a large cupcake? Smile, and let it go. Tomorrow's another day.
Try a fashion or beauty trend that's out of your comfort zone. Don't think you can pull of pleather leggings, or hot pink lipstick? Don't let that stop you. Rock it with confidence.
Don't settle. Keep reaching upward.