When things start getting tight, I look at other sources... Pet Photography (much easier now that I have a studio), Mini-sessions at a local attraction (park or lake, usually). I get my clients to shill for me ("Hi Jane, this is Dave from Topeka Design. {Blah blah, small talk}. Hey, the reason I called is because I noticed it's about that time of the year for your family photos and I was wondering if you'd be interested in getting you next session for free, including prints. Invite your family and friends over, hold a little party at your house and we'll shoot there. I'll give you 10% off your photo package for every package I sell. So if I sell 10 packages, yours is completely free. And I'll give you an additional $50 print credit for every package sold after the first 10.")
Also, I'm usually 1 or two holidays ahead. So right now we're shooting Christmas sessions. In November we'll start shooting Valentines sessions (we promote our Valentine sessions during the Christmas holiday shopping season).