Partnerships the key to freelance survival?

I've been at a bit of a loss lately since the small agency with whom I had partnered on a lot of projects went out of business. Not only did they add value to the clients I had, but they also were a source of some referrals to me. And we often combined resources to bid on projects of bigger scope. Well, another partnership seems to be forming for me, and I'm kind of excited about it now.

I met another freelancer at a networking event and it turns out we had a lot in common. Our personal conversations are fun, interesting and stimulating. And her skills really compliment mine, without a whole tonne of overlap. And best of all, she's great at cold calling and sourcing new business, things I'm not good at nor do I enjoy. And her specialty is in an area I really want to work in -- sustainability. I've had some experience in that arena but not enough to be anywhere near the expert she is.

Anyhow, it's very early days, but we are seriously discussing formalizing some kind of work arrangement that combines our skills, making a list of target clients, then going out and knocking on doors or holding seminars or something. If it worked, this could be the kind of situation that would keep me freelancing for a while longer, before I had to give up the freedom and go 9-to-5-ing. And since my kids are still pretty young, another year or two of this would be lovely.

This is the first time in ages that I've felt invigorated about the possibilities of refreshing my freelance offering. Of course, that's today. Tomorrow could be a different mood swing. After all, I am 40 now. Doesn't that mean pre-menopausal mood swings are due to start?