When you think of changes to previous sections/chapters which require pretty extensive alterations to the remainder of the section, do you go back and make the changes (which I find takes quite some time)? Or do you just power forward assuming the changes for following sections/chapters, and make notes of what to go back and fix later?

I find myself getting stuck on some basics - say, some critical part of a character's personality - and indecision of which tact to take, and then I'm just not sure how to proceed.

I'm sure everyone does this differently but I'd love to hear some various styles. Thanks!