Decided to solve problem with regular expressions? Now you have two problems...

Regular expressions is real pain for me. Somehow :) I use them so rarely so I have to learn them almost from the very beginning every time I need them. By the moment I know enough to use it successfully I can move on for next few months and my knowledge evaporates till the next stop on this vicious circle.

I used handy online regex tester until recently. It chokes sometimes (certainly not due my poor syntax ;) but it's very good for quick test. Eventually smart people pointed me to a lovely Espresso utility. With the help of this great tool regular expressions are not that excruciating. At version 3.0 it packages a lot of features and is very user friendly. Just go there and get it. For free.