I am working from home but I am doing some admin stuff from the job I did before I had kids. I do 16 hours a week so I usually do 3 to 3.5 hours per night. it makes for a very long day for me as I have the kids all day then DH comes home and it is dinner, bath etc. I try to start work around 6.30pm and work to 9.30 to 10pm but there are many nights when the kids are being ratty or want me to do stories or whatever so I start around 7.30pm and work to 10.30 to 11pm. Also when DH goes away for his job by the time I sort out the kids and tidy up the house It is late.
I also have friends who have started up their own internet business selling different things. One sells, baby shower stuff, one sells party stuff another one sells table decorations. Another friend has set up a photography studio at her house. They seem to be doing ok at these and some of them have even employed stuff to help. I also have a friend who sells avon and does ok with that.
Good luck on thinking of something to do