Somewhere around the end of the month, I buy the Webscription for three/four months out (for example, I bought Nov '03 somewhere between July 31, '03, and Aug 5, '03).
Baen Books has this nifty 'buy one, give one to a new customer' policy. If anyone has not received a Baen webscription before, and wants a free month, let me know! Your e-mail address has to not be in their database to get a free month. I'll take requests in the order they appear in my home inbox - sraun@fireopal.org.
First request gets August 2008. If you don't get a month this time, I put you on my request list, and you get first shot at the new months as they come out.
The Last Centurion, by John Ringo
Exile-and Glory, by Jerry Pournelle
Between Planets, by Robert A. Heinlein
Hell on High, by Holly Lisle
Other Times Than Peace, by David Drake
We the Underpeople, by Cordwainer Smith