21. How about cornering a little market? There are DMOZ categories with grandfathered sites (sites that have been listed for many years) which aren't being updated. If you can pick up a few sites in the same category and merge their content suddenly you "own" that niche. That opens a lot of possibilities.

22. Several jobs exist on a pay per hour basis but the better paid ones are probably contract jobs. Some examples of both: Copywriting; proofreading of web content/ebooks/newsletters etc. (elance, guru, rentacoder, graphicdesign, more).

23. Email or phone answering: Be one of the first line support staff manning a company's phone or email answering service. Filter out the easy questions by pointing the user to relevant sections of his manual and escalate those that seem genuine problems. You are saving the company's engineers' time and providing a valuable service - that they pay for. A variation of this is chat help where you actually sit at your PC and text chat to users who've reached a firm's website and clicked the help button. Sometimes a bit of training is involved.

24. Good at web design, HTML, CSS? Create designs (templates) and flog them. You can sell each one multiple times to webmasters who don't have the time or patience to get familiar with the intricacies and quirks.

25. Monitoring Wikipedia/ forums/ blogs for mentions of a particular name, brand etc. A recent expose showed that several Wikipedia entries were being manipulated by a US political party who had several stooges signed up for just this purpose. Wouldn't their opponents want to know each time they're manipulating some facts? Find someone who needs some news "managed" or needs to know when news is being "managed" and get paid for it. You need to be "proactive" as these jobs aren't "advertised" but the fact that they aren't advertised means that others don't know about them, you have an advantage. And there are opportunities in almost every language.

26. Directories: start one. Webmasters pay to be listed in your directory. The better your directory the more you can demand. Niche, hand compiled directories are a million times better than the SERPs dross and both companies and users know that.

27. Filling in surveys. True, there are a lot of duds around but there are still some programs that pay you for doing mind-numbingly dull tasks like filling in surveys. If you aren't fussed about privacy and are willing to disclose all your personal details (or fictional personal details) there's usually someone willing to pay you, From YouGov to Ciao. This - and some of the next few - are called IFW or Incentivised Freebie Websites.

28. Get paid to read email. Why would companies pay for that? Plenty of reasons, not least that a human eye can spot SPAM that even the best program doesn't catch. Even the best anti-spam program has some false positives and some companies can't afford to have any.

29. Do other filtering. There are people who'll pay money to have you filter through those millions of ebay listings to find them the specific objects/ curios/ stock/ book that they really, really need. Another filtering idea: Businessmen looking to buy sites regularly visit the Site Buying/Selling forums and trawl through thousands of listings a week. Get talking to one or two of them, offer to get familiar with what they are looking for and to do the looking for them.

30. The web has allowed easy access to industrial quantities of free stuff. For example, in 2007, a major manufacturer of cricket bats had a problem. Cricket bats can't have knots in them so most of the wood from the willow tree has to be discarded as scrap. Not a few bin bags full but 70 tons. Per week. Yes, lorry loads per day! Free. They listed it on the eastex.org.uk site. Opportunity: Find a company that sells bark mulch for gardens. Find out how much they are paying to buy wood. Offer them 70 tons of fine willow a week at 50% of their current costs provided they pick it up themselves. Or contact manufacturers of chipboard/cat litter/use-your-imagination. OK, eastex may not still have that particular opportunity... but there are others. And on other sites.