They sell little stickers you can put over your keys to blank them out so you don't peek. My parents told me when they learned to type in school on a typewriter in the 60s that they had typewriters that came with only unlabeled keys.
I think the best way to learn to touch-type is to actually replicate typewriter-style touch typing exercises: get a source document, put it up somewhere convenient to your workspace where you can comfortably look at it but not your monitor or keyboard at the same time, and type from that into a text editor or word processor window (something that doesn't autocorrect as you type, so if it has that feature, disable it.) Time yourself on a particular work, and go back and verify that its error-free once you are done.
Great point, peripheral vision helps you find the location of a key instead of getting it from memory. Also, typing blind helps you learn how to be sure of where you are in the sentencem I'm actually typing this without looking and it's easier and faster than with my eyes open.
1) Buy a sliding under desk keyboard tray
2) Leave it under the desk while you type. Don't slide it out
3) a few weeks/months of pain
4) perfect touch typing
You will be shocked how often you were unconsciously looking down at the keyboard as you typed