Ambition is a double edged sword

Ambition is wonderful. Ambition is tiring. When you hear people talk about other people's accomplishments, people they admire, people who have a vision etc., ambition is attributed to them. Ambition is the mother of accomplishments. Accomplishments beget praise and admiration. People like to admire things.
In general, I like the fact that I'm ambitious. It gives me something to do, and it pays off. It feels good to accomplish something. It's also very tiring at times. Ambition is like a fire - it's a useful tool, but if you lose control of it, you're in trouble. As you get comfortable with your new accomplishments and endeavors, your fiery ambition starts to burn more - you want to push yourself some more. However, eventually it takes control of you, and you feel overwhelmed. I think I've reached this point. I want to do so much in life. Life is short.
Being class president probably consumes at least 25 hours a month of my time. As an exec on the pediatric interest group, more hours are consumed. (thankfully not too many because I have amazing co-execs). The annual Tachycardia theatrical play is consuming a lot of my time (I'm in the play, and I'm dancing in it too). Countless emails to reply to. Countless profs and doctors who are asking me to write a reference letter for an award they were nominated for. Furthermore, I decided I want to learn how to play the guitar, and so that consumes more of my time (although it's unbelievably fun!!). My commitment to going to the gym or at least trying to exercise at home consumes at least 1 hour/day. Trying to plan, organize and book things for my summer travel to Europe consumes time. Ethics project consumes time. Then there are the little things that really add up a lot - cooking, shopping, catching a moment of silence, listening to friends, friends' birthdays, helping friends, and catching up with the parents.

I'm not sure what I'll do when I look back at this and realize that in the end, things work out. Will I learn my lesson once the fire's under control? or will I be tempted to play with something much bigger?