I coach a 10U TB team and have a number of new girls from 8U and a few talented REC players moving to the TB game. A lot of them really struggled early trying to decide which pitch to swing at etc. What I told them to do is to think about what pitch they like the most, (low outside, low middle, inside, etc) and feel that they could hit. Go to the plate ONLY swinging at that pitch. That eliminated all the other bad 10U pitches they would see. Once they had 2 strikes they had to swing at anything close. It made a huge difference for these young batters and their confidence. If they struck out, many times it was because they didn't see the pitch they wanted. I was ok with that. However, they became more aggressive on the pitch they liked and many of them started killing the ball. It also cut down on the swattin at flies swings and turned some normal strike outs to walks. It was a simple mental approach for a 10U player and it worked very well.