If you have a passion in your life -- writing, painting, music, sculpting, dancing, acting -- and if this passion is the reason you believe you're alive, then check out The War of Art by Steven Pressfield.
One of Pressfield's premises is that we're all MEANT for something, we're each here for some reason, to create something in the world (Eternity is in love with the productions of time) and if we don't live for and through this, then we're wasting our time. He blasts away even the most stubborn and alluring resistances - the excuses we tell ourselves for not doing the work.
This book can rev you up -- it's short (165 pages)and powerful. I breezed through the book in a few hours and felt energized. Pressfield puts art-making in perspective, puts procastination in perspective, and delivers in a direct, conversational tone -- as one human who is trying to live a life that means something to another. I've read a lot of "how to" books and most don't live up to their hype. This one deals with how to overcome the obstacles of ambition and how (and why) to discipline yourself. As much as a cliche as it may sound, it will make a difference in how you look at what you do. Give it to anyone else you know who wants to write, paint, act, dance, compose, and wants to follow their dream.