[opan]

Between my old made-up typing style (left hand hit over half the board, hit x with thumb, few other weird bits), learning homerow, learning to type on ortholinear keyboards, and learning dvorak, I've found it works well to use one of those sites that has you type various letters to get used to them, then once you're comfortable, move to something like 10fastfingers to grind speed. Practice daily. It's pretty fun for me, which makes it easier. I hit 160wpm (peak not average, pulled it off only twice) at my best before learning homerow. Never quite made it back. I'm also a bit slower with dvorak now, but maybe I can get up again someday. I'm around 115-120wpm these days which is pretty passable, but I do miss the absolute joy of typing as fast as I could and really pushing my limits.