If it's broke, fix it
To return to your last edit point, press Shift+F5. For instance, if you have copied and want to return to where you were in order to paste.
Press Shift+F5 again to go to up to the last three edit points, or a fourth time to return to where you started.
In Word 97 you could use this when you first open a document, to go straight back to where you last edited.
There was a change with 2000+ that broke this. The \PrevSel1 bookmark is destroyed when the document is saved.
The Word MVP site has a fix and some other interesting suggestions:
GoBack (Shift+F5) doesn't work in some newly-opened documents
Here are some more bookmarks:
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