I love this question. It can be stressful dealing with the demands and responsibilites of your personal life while having obligations to others (helping out your fellow man).
I get through it by reminding myself that every day has a lesson. I know that tomorrow I will have learned something new that I didn’t know today. Whether it’s good or bad, I know that my new knowledge will only add to my quality of life and my ability to understand this life a little bit better. I have stopped taking myself too seriously. I still try very hard at most everything I get involved in, but I have learned to accept failure as a part of life, and I look at every failure as a lesson learned. It’s like of like LaRue said a while back on another question about certification exams. If you go into the test knowing that you won’t get every question right, it takes some of the pressure off.
I have learned to appreciate the small successes in life; it makes everything else so much easier to accept. At the end of the day, being able to sit down and say, “you know what, I’ve done my best today” is what keeps me going. Knowing that I put forth my best effort today gets me through to tomorrow.