bartjan's botcheck trainer
When I started playing, I couldn't read them very well, but once I got used to them, they came much easier. bartjan's botcheck trainer allows you to practice, and as you practice more, you'll find that you make less mistakes.
Nowadays, the only times that I make a mistake are the times that I type too fast and hit enter while the wrong thing is up there, and while the page is submitting, I realize my mistake and slow down on the second try.