A problem is much easier to handle if it can be avoided. While this sounds redundant and obvious it is often over looked. The work to fix a problem can lead to much larger issues than the one problem being solved. Once a document is opened for revision it often needs significantly more changes then just the one item you opened it to fix. changing a single component can be simple but it can also open a month long project of trying to get approval that can leave you incapable of doing other work. Proper planning prevents pretty poor performance. A small amount of time preparing can lead to significantly less time needed to fix the problem.