"Professional secrets" blog Tricks of the Trade offers this tip for managers who have to deal with a large influx of employee feedback:
If you manage a large number of people who are always offering suggestions, insist that feedback be submitted in writing. Blame your faulty memory, if you want to be diplomatic. The bad ideas will be discarded before you hear them, as the employee won't want to go through the effort of writing them out; the good ones will be more complete and better articulated, as the submitter will have to think his idea all the way through before sending it in.
In other words, break out the old suggestion-box! I think it's always a good idea to get things in writing, even when it's something as simple as an idea or suggestion. Got a better method for managing employee feedback? Hit the Comments page and tell us about it!