Regex

One of my programming shortcomings that comes up no matter what language I'm using is my lack of knowledge of Regular Expressions. They shouldn't be hard to use and knowing how could be very useful. I just don't get them, even when I think I do. If I try to type them freehand, I just screw them up and break things. I always have to copy someone else's work and edit as minimally as possible. I'm trying to commit to fixing this, so I can save lives.