If you are looking for a great newsletter on techniques, you might want to subscribe to Technique Junkies Newsletter. Pat Huntoon puts this great newsletter out every other month and it is crammed with techniques! You can get information on her website:
http://www.patstamps.com
Tell her I referred you and I'll get an issue added to my subscription!
Everytime I get a new issue from her, I see people start asking about the techniques up here and on Stampin' Discuss since so many of us start making and posting samples online after we get the newsletter!