Well "romfixes" is a safe bet, it is a good idea for pretty much any setup.
Other modules that are good to have (TM): FixMath404, PatchMath020 and ramlibstack.
060 users might want to add FixGetMsg.
If you're using the A1200 IDE, then add SpeedyIDE.
Note that there are more modules but these are IMO the most important ones.
*EDIT*
Once you have these going you might want to look into splitting the "AmigaOS ROM Update" file to modules (romupdatesplit) and preloading them with BlizKick instead. Saves single reboot at system poweron. You'll need to look into EXTRESBUF argument for these, since they can't fit inside the ROM itself.
And yes, I know... it's not very end user friendly app. :-)