Accuracy is the most important because accuracy makes speed. If you just speed through typing practices without focusing on accuracy you will more or less continue to make the same mistakes throughout. Focusing on accuracy will teach your fingers, which will become speed later. Even if you need to take a short break during typing when coming to a complicated practice, this will be better in the long run (in my opinion).

Most people on here recommend 97% accuracy as the target. I think this is a good mark, but during the transition (which I believe you are in the middle of from other posts) 93-97% is probably good early on.

Hope this helps. Stick with it, you'll never go back!

What Davkol and Jonhines said.

Think of it as analogous to learning a piece on the piano. First, go slow so you don't actually learn errors. If you keep making some mistakes, go over them over and over until you've overlearned the right way. Then speed up to a natural speed while keeping the error rate down: For the piano, go for zero errors – for typing, 97–98% is good enough to be in flow; I've done some of my fastest typing with 98% accuracy so that seems like a sweet spot for flow but 97% is more realistically achievable. Eventually, try playing/typing at full speed to experience flow.

TypeRacer Death Mode

http://play.typeracer.com/?universe=accuracy

it's 100%, but it isn't about the percent, like, say, 98% vs 99%. It's about the zero tolerance for mistakes (one mistake and the entire race is over). It causes you to focus on your typing at any speed.

http://blog.typeracer.com/2010/03/29/accuracy-matters/