In no particular order:
Be kind to others, but don't be a pushover.
Find something to laugh about everyday
Tell the people you love how much they mean to you.
Don't be petty or nitpick over nonsense. It's not important.
Time is precious, don't waste it. ^^^^^^^^^^^^^^^^^^
Don't wait for a special occasion to use your pretty or fine things. Every day you are alive is special.
Make education your priority.
Live YOUR life YOUR way.
Be a friend to someone who NEEDS a friend.
Travel.
Honor your body.
Respect other people's boundaries.
Always try something out of your comfort zone.
And--
Don't pay too much heed to anonymous avatars on on-line discussion sites.