Similar to keyboard accessibility, undo is one of those things you should only consider if you don't have any less time consuming features that you should imple

Similar to keyboard accessibility, undo is one of those things you should only consider if you don't have any less time consuming features that you should implement. The easier workaround to the "oops, I didn't mean to do that" problem is to make it harder or awkward to do it in the first place - e.g. turn reset buttons into smaller, less prominent links, don't put delete buttons right next to edit buttons, don't cram unrelated next-step actions together (e.g. "send email" and "add attachment" shouldn't be right beside each other), etc