My colleague Johan pointed me to some interesting Microsoft tools that make the migration towards Office 2007 (and its new Ribbon) much easier.
If you knew where a certain feature was located in 2003 (e.g. in Tools, Options), you can either use an interactive guide that really shows you where it is in 2007, or you can use an Excel reference file to look it up.
Have a look at https://support.office.com/en-US/article/Reference-Locations-of-Word-2003-commands-in-Word-2007-154D4788-DA09-4818-B7E3-163B0F98D34B