Well that rules out the only ways I know!
I can tell you how now to go about it: giving people money. Have you heard of that model scam where someone is told that s/he has what it takes to be a model, but s/he needs to pay for some portfolio pictures first? I mostly come across fake escort agency versions of this (who often promote non-existent markets such as non-sexual work or services for female clients), but there are also versions for work-at-home schemes, so if someone tells you that you can make good money as a virtual secretary or something just as soon as you pay to be in their database, don't be tempted.
If you don't have a specific skill you can market, the only non-sexual ways I know of that might bring in that kind of money online are:
Online gambling. Not a good idea to dabble in; you need to know what you're doing and treat it as a business.
Essays on demand for lazy students; not very ethical and you need an area of knowledge to work with, but I think there's some money in it.
A couple of things my mum's tried are:
Mystery shopping. Some of it's online and you might also be able to visit shops in your lunch break (then you write a report). Won't bring in that much but might be worth a go.
Affiliate schemes. There are various sites (she uses hubpages) where you can write articles about stuff and include some affiliate links (e.g. amazon, google adsense) in the hope that people will find your article and then click on one of the ads so you get a little money. It took her a long time to get enough money from that to get her first payout. Her existing articles have started to generate more over time, but still not a lot. (You can also do this on your own by setting up a blog with ads, so you don't have to pay a commission to hubpages etc., but they do provide ways to help get your pages in search engine results which you'd also have to do on your own too if you went without them.)
Have you looked at the moneysavingexpert forums? They might have some ideas. Good luck.