[jaydicassdhy]

It's really easy to give advice such as 'just let go of the bad shots', 'don't think about your score', 'don't focus on luck'.....

It's really difficult to program yourself to actually do it though.

I'd recommend reading a book or 2. There will be some things in there that will ring true, and give you some thoughts and techniques for on the course.

Personally, there are a few things I try to do during a round to keep me 'present'.

Solid and consistent pre-shot routine.
Relax and loosen myself over each shot.
Commit to the club and shot I choose before attempting to swing it.
Be aware of when I'm tense (especially between shots) and try to loosen up.
Play for par. Make my target the fairway, then the green. Anything more is a bonus.