This is ony half serious:
Make sure that every time they get involved that they end up with more work and headaches as a result. After two years of that they'll have a nervous breakdown.
It does rather help if you anticipate their next idiotic request, and then randomly respond either before they mention it, or else leave it until it is overdue.
Selective amnesia is also a good tactic.
Always cc his boss when requesting that he prioritise projects. Always estimate that jobs will take twice as long as is reasonable (that's not a bad idea anyway). Keep notes.
If he asks for something be done as a rush job spend an hour writing a note explaining how it'll impact on your other tasks. Even if it is only a two hour job.
Now, the above is a high risk strategy. The proper answer is that he is micromanaging because he is insecure, possibly because he doesn't trust you, or does not trust himself. In theory the right thing to do is to demonstrate that he can trust you, by anticipating his requirements, telling him what you are doing, and delivering good work on time. However that merely reinforces bad behaviour, Pavlov would not approve.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.