I've never had a putting lesson. Everything I know about putting essentially comes from playing putt putt as a kid. I've also never really practiced or worried about it too much, because my entire game sucked equally. Now, it's becoming a serious liability. Last round I played I hit three GIR that I then proceded to double bogey. So assuming I'm starting from scratch (in terms of putting) how should I practice? I need a lot of help with distance control, starting the putt on the right line, etc.
Any tips would help, including stuff to do at home on a putting mat.