I went clipless some years ago on my mtb. Scared the $hit out of me when I got into situations I couldn't really navigate. Got in the lazy habit of unclipping one foot to be safe. Then I realized if I just powered over those sections I ended up doing better. Clipless is great. I'm not very good on the full circle power stuff, but when I go up a hill I tend to focus on doing that and it usually makes climbing easier - at least until my less used muscles complain and go back to just pounding down.

A couple things to remember:

1. You will fall - accept it.
2. Hmmm

Okay, just one.