re: Putting: To line up OR not

I don't line up the putts 10' or longer, mostly just try to pick a spot and feel it. Inside 10' I use the line I make on my ball. It seems to work ok, I'm not very good either. I've tried everything, different putters (blade, mallet, long putter), tried different sized grips, different lengths and nothing seems to help. I need to practice more but it's very boring and after a while my back starts hurting. I don't hit a lot on the range either, I'd rather play but I know it would benefit me more to practice more.