I've never thought of acting as rocket science - you put on the costume, get your hair cut and that's it really. I started off in my career in quite serious roles and then went into a bit of comedy, now I seem to do a mix of the two.
I just turn up and get on with it really. I try not to get in the way too much. Of late I try to be as relaxed as possible. When I relax, more things happen and things flow better.