Not sure what your skills are - what did you do before you gave up work. I work from home doing marketing and PR because that is essentially what I did before.
I don't know how you find out about them, but other friends of mine earn money by:
doing admin/marketing/pr/hr for companies
doing courier work (although that isn't "from home"!)
packing samples/envelope stuffing
buying and selling antiques (mostly on ebay)
franchise for nappy selling
I just did a search and find www.homeworking.com which seemed to have quite a bit of info - good luck.