Useful hint.
My laptop keys were flat and sometimes in low-light when I typed I
noticed my fingers were on the wrong keys.
Reinforcement rings for notebook paper have a circle
in the middle that is left on the paper when you
remove the circle. I took these dots and put them
on the "f" and the "j" and now I know to put my
index fingers on these two dots. Has saved much re-typing.

That's a GREAT idea! I am going to try it too! Thanks for sharing!