I have weekly sessions. The day of and after a session I do a lot of processing and reflecting on the work that was done. I write a lot about what came up for me, then I put it all away for a few days, live my normal life and then 2 days before my next session I start trying to get back in that frame of mind again. I might write about what I want to talk about next session and I'll perfect what I wrote about after last session.
So this leaves only 3 - 4 days of normal life before I start preparing again, so it's doesn't seem that long really!