When you start is up to you. I would recommend choosing a date before 1 January 2011.
I'm starting now because I've had a wee blast at the sales.
While my stash doesn't even remotely compare to others, when I think about what I have - really I've probably got enough to keep me going for 2 or 3 years.
I've got;
* several WIPs (4 that I can think of already - but I know there's more),
* BOMs (not started),
* Ryan McKenna kits (not started), and
* the stash.
I want to get my spending under control - and this is a "fun" (yes it really can be fun) way to do it.
Confessions - why not. Tomorrow will always be other day, and another chance to get back on track.