Since Normal.dot can be corrupted so easily and it seems like every forum tells users to delete it where there is a problem, I'm sure there are many annoyed users that just lost a whole host of Word settings, macros, styles, and other customizations.
There is a way to avoid all this. Create a document template. Call it MyStuff.dot (notice the "T" at the end) or whatever you feel like as long as the Save As field says "Document Template (.dot)". Word will default to saving this in the same folder as Normal.dot, which is where you want it to be.
Any time you create or modify a style, tool bar, auto-text, or macro, make sure you save it to MyStuff.dot instead of Normal.dot. Usually there is a drop-down list at the bottom to select where the item will be saved. If not, then you can use the Organizer to move the items from Normald.dot to MyStuff.dot (from within Word, press Alt-F8, and then click Organizer button).