You can do an online course to get qualified to proof read books pre-publishing. Most of the courses are work at your own pace.
If it's something you think you'd be interested in, you should look into it SG. I'm actually thinking of doing it myself some time after the baby is born. Maybe it's something we could even think about doing together...for motivation and all?
Anyway, just thought I'd add my two cents worth in. I'm sure you'll think of something good.
