When you are typing and have a typo...?

Depends when I realise I made the mistake usually I backspace but if I'm writing an essay for school if I don't realise it right away I do when I re-read it and do the whole point click thing!!! Usually though I realise pretty soon after but I can be fussy about how many words later - if it's a good sentence I don't want to forget it so I would just point and click or press the arrow key to move back - the arrow key is so much quicker and you don't have to move your hand too much anyway!!! I guess I can be quite lazy when I type... is that a force of habit??? I wonder...