I just finished a great business book called "Rework." And like a lot of business books, it's got plenty of application for high school students, too. Here's an example.
Page 271: Inspiration is perishable.
"Inspiration is like fresh fruit or milk. It has an expiration date. If you want to do something, you've got to do it now. You can't put it on a shelf and wait two months to get around to it. You can't just say you'll do it later. Later, you won't be pumped up about it anymore. If you're inspired on a Friday, swear off the weekend and dive into your project. When you're high on inspiration, you can get two weeks of work done in twenty four hours. Inspiration is a time machine that way…Inspiration is a now thing. If it grabs you, grab it right back and put it to work."
The next time you're excited about something, jump in and do it now. If you've got a fundraising idea for the soccer team, start it. If you write stories and come up with an idea you love, put it down on paper. If you play music and get excited about putting a band together, get your first practice scheduled. If you're excited about a new book or a project in physics or a new training program to get you in better shape for baseball tryouts, start. Do it now.
What's the worst thing that could happen? Maybe you're not as excited about the idea when it's finished. But that's not likely to happen. And even if it does, you'll probably have learned something along the way.