If the tchnique is what bothers you: work on your right hand! Trust me, whenever I left my guitar for a few weeks, I had the same problems. I just had to do some right hand riffage workout, and then it was all right.
Do some galops, aplm mutes and stuff for about 30 minutes, and your technique should be fine :)
If you have a "creativity problem": Do some improvisations on the songs you like... just relax and let it flow, whatever comes out. Don't force it! It will come.