In the "good old days" of phototypesetting, we had the ability to store up to 10 copy/paste items, including formatting, into the F keys on the keyboard, so that they could be accessed with one keystroke. Is anything similar available for IDCS5? I already use styles and shortcuts, but formatting can still be tedious when a long document contains many repetitive elements.
@1106design – you could use snippets and libraries for that purpose.
Though you would need some scripts to get some flexibility into that:
store the items into libraries, update the items in the library, place the items etc…
But if you ask for PlugIns: you could try SmartStyles from Woodwing.
If you're doing a lot of typesetting for an InDesign document you may find Incopy a good investment. Download the trial and if it a test run.