I generally correct my typos immediately, as in before completing the word. Occasionally I’ll complete the sentence then go back.
Assuming you notice them, when do you correct your typing errors?
The really obvious ones I correct immediately, although when it’s something for work I always reread it before submitting/printing just to make sure I didn’t miss punctuation or a misspelled word somewhere. And then I usually do anyway.
Immmedatly
Type type tipe ty. . . backspace backspace backspace backspace backspace . . . ype type type.
I’m always reviewing for typos. Most of them I catch immediately, some I catch when reading over the post before submission, and a rare few I catch directly after posting.
The typos caught by the spell checker get corrected immediately. Otherwise I check for typos after every sentence, and then after I look over the whole document.
Most of the typing I do is just posting to boards like the Dope. My browser has a built in spellchecker, so I’ll take note of any misspellings and correct them then. Then, I’ll preview my post to see if there are any other errors. Then I’ll correct one more time before submitting. Even then, I don’t catch everything so I try to edit before my 5 minutes are up.
Only after I’m done. IMHO, stopping to correct is a waste of time - whatever spellcheck doesn’t catch, my proofing will.
Of course, I’m a terrible typeist, averaging two typos or misspellings per sentence, many of them repeated. If I stopped to fix them I’d never finish.
To paraphrase Stephen King:
The first time I am writing for me, and I don’t care about typos.
The second time I am typing for my reader, who probably does care.
So I type the whole document, then correct.
i’m too anal to let a word, let alone a sentence, go w/o correcting, altho auto-correct catches most of it.
There are writers who edit and editors who write. I’m the latter. I babble on without regard to content but always paying very close attention to my spelling and punctuation. Then I go back and reproof the content to make sure it’s what I want to say. Which is pretty much bass-ackwards of what every writer says. 
the only time i ever used to not correct everything immediately was when i was a newspaper reporter. when you’re facing a noon deadline and you get to work at 7am, sometimes getting a story to bed in time was a major hassle.
i learned quickly to ‘throw something up on the word-processor’ (yes, you young whippersnappers, i said word-processor and not computer :D). that way, you’re looking at something in front of you and can start shaping your story from there. if you didn’t do that, you were looking at a blank screen and the longer you did, the harder it was to start something - anything.
after i got it ‘on paper,’ then i went back and polished it up.
I usually correct my typos as soon as I see them…if not sooner.
If I’m on a keyboard I’m comfortable with, I can often “feel” the typo before I see it. It’s
not unusual for me to hit a wrong key, “notice” it a few keys later, press a few backspaces and keep going…without processing it consciously and visually.
But the rest of the time…it’s when I see them…close enough to immediately.
-D/a
Odd, that. Just reading that pings my anal-retentive anxiety meter. I just can’t NOT make the correction immediately.
Wonder if there’s a deeper personality trait working here…
I leave it if I’m in the zone, but otherwise go back and correct it immediately. I particularly won’t do it if I don’t immediately know what’s wrong, as I’ll take the time to figure that out later. Or, more likely, just use spell check.
Oh, and there’s always the possibility that I don’t notice until backspacing would be inefficient.
As soon as I see them.