The very wise Zen Habits has a great list for anyone who is a parent and who finds life stressful sometimes (or most of the time). Try even some of the things on the list, and based on my experience, you will naturally find yourself become a better parent. For the whole list, and lots of great advice, see 25 Ways to Simplify Your Life with Kids | Zen Habits
You can buy alot of books and magazines on parenting, or you can start with this list. I would go with the list first. 🙂
Smart People I Know 