Eventually, I'd like to be a doula, which would be self-advertising to find work. The DONA program I'd go through does put your name on a list, but what's in just a name, you know? My point is, I have this natural sense of anything human body and babies, so yes, I would be passionate about being a postpartum doula.
Do you twitter? A lot of people promote their businesses or charities or products on there. I run tech support for an online twitter bot... PM me if you want info on that, it could be a good starting point.
I also write, but that's more of my hobby. ONE DAY, I'll publish something :)
We also own a boat club, but that's because my FIL owned it and passed it along to my husband and I to manage. We have approximately 50 private members. It's super private; the only way people can get in is to sit on a waiting list, and even then, they have to know someone who's already a member before becoming a member themselves. We're still learning the ins and outs as far as dues, liability, finances, etc.
I don't think that helped ;) BUT, make yourself a list of things you love, things you're good at... and see if you can't make that your dream business!
GOOD LUCK! :)