I cut them, tie the stems, and hang in a cool dark place. I cut them as needed to trim down. I've got some oregano and thyme hanging already.
Some herbs you WANT to go into flower, for example Dill weed as the seed can be used as well as the weed. Generally speaking, I dead-head all of mine with the exception of the dill.
Here's a nice link, especially if you plan on using your herbs for teas.
http://forums.gardenweb.com/forums/l...380726966.html
Hmmm ... some conflicting data here.
http://davesgarden.com/guides/articles/view/106/
I personally am going to keep dead-heading my herbs. The basics of plants (especially annuals) is that once they flower and seed, they've done their job and they die (or hibernate). So to keep my herbs and annuals (and some perennials) in flower and/or alive, I dead head.