Get organized.
Okay, okay, I do work at a place named Organize-It, I've compulsively made my bed every day since I was 5 years old, and everyone knows how neat I am. But still, I think it is important to everyone. Think about a time when you couldn't do something because you couldn't find it. I strongly believe you will get a lot more work done if you just take the time to put things in order first.
Get the bad stuff done first.
Okay, I am definitely bad at this one sometimes. Jot down a to-do list and get done that dreaded homework, head off to work, or clean your room before you go out and have fun. I'd guarantee you might have more time to do the things you like if you get the other stuff done first. In addition, you won't be mulling over the dreaded tasks that you've been procrastinating!
Think about what you're doing right now.
Surfing the web mindlessly? Watching TV? Anything else you could be doing that would be more productive or more satisfying? I strongly believe you need your downtime so don't freak out claiming that I believe we all need to keep our heads down working. However, I know I spend more time doing 'down things' than I really need to.
I think a lot of people waste time being mad.
Don't hold grudges; argue and fix it. Spend lots of loving time with the people you love. You don't know how long you might have with them.
"Failing to plan is planning to fail."
Plan your day, plan your life, and plan to leave room for days or minutes when you have nothing at all planned to do.