GO A HEAD. 
Take chances. Tell the truth. Date someone totally wrong for you. 
Say no. Spend all your cash. 
Get to know someone random. Be random. 
Say I love you. Sing out loud. Laugh at stupid jokes. 
Cry. Apologize. Tell someone how much they mean to you. 
Tell a jerk what you think. 
Laugh until your stomach hurts. 
Live life. Regret nothing.