1: Slow and accurate is better. Build up speed.

2: Do not look at the keys. Learn the finger positions. Try covering your hands with a tea towel. (Or buy a keyboard with no markings. (Which has the added advantage of switching to other layouts easy.))

3: Practice little but often. Do short stints every day rather than long stints all day. (This is training drills, you should be trying to touch type all the time.)

4: IMPORTANT: PAY ATTENTION TO ACHES AND PAINS IN YOUR HANDS AND WRISTS. Some people find that touch typing, especially the positions recommended for the hands, causes discomfort. Sometimes that discomfort can be a severely debilitating RSI. The software I liked was "Typing Master" (http://www.typingmaster.com/) but it looks really dated now. Maybe there are much better softwares around.