What did you do to find a cofounder or the team that you are working with right now?
The only companies I have started were with people I already knew. So, unless you can think of 1 or 2 people within your "sphere" that you want to tap on the shoulder, it's best to go out and meet people your area of business interest. Around Boston, there are numerous high tech and biotech entrepreneurial communities and networking events. Depending on where you live, there might be the same. If you don't live in a thriving entrepreneurial area (like Cambridge/Boston, the Bay Area, NYC), the networking is doable but a lot harder.
Send me a separate note and depending on where you live, I might be able to point you at some communities.
Best of luck.