E.A.
I found a lot of my frustration as a young mother stemmed from not understanding the child's developmental abilities. Being able to "see" things from their point of view, coming down to their level instead of talking at them from above, giving them time to express themselves, etc...are all good strategies.
Dr. Sears is a great non-combative gentle discipline resource. His website is http://www.askdrsears.com/about.asp
good luck!