From "Committing code often" discussion:
It is ok to make mistakes, especially in the first "rapid-fire" version of the code.
There is no shame in it.

Even more: if you are not making any mistakes while coding - that means you are way too careful and are working much slower than you can.
(That does not mean, of course, that you should intentionally do mistakes. Just take greater risks in order to improve speed of programming/coding until you start getting occasional mistakes).