11. Drop catches. People sometimes forget to renew their domains and these expire. Picking them up will give you some remnant traffic from sites that link to this domain/people who've bookmarked it etc. In some cases the traffic can be pretty high. Provided you're fast enough to replace the copyrighted content that was there with something else you can make quite a profitable business from doing nothing else but this.

12. A variation on the above. Sell the domain back to the previous owners. Note that you may want to tread carefully and get familiar with the rules for that TLD before you start sending off ransom notes. For example, with ICANN (domains that end in .com, for example) the moment you send the previous owners an email saying you've got their domain and you'll give it back for $10K... you've lost. It can't look like a ransom demand. Be reasonable and read the small print of the UDRP. No UDRP required if you're sitting hostage on myspace.com/theircompanyname or the equivalent at blogger, twitter or other big destination.watch them kick themselves and sack their web advisors who told them about taking the "dot info" but omitted to mention the importance of protecting the brand by owning the associated myspace directory (and others)! And it costs you nothing!

13. Run a domain management service. Hundreds of thousands of webmasters (or more) have a large portfolio of domains. A lot of them would like the boring bit taken out of their domain management. You can run their DNSes or just a service reminding them when each domain comes up for renewal. Or an automated monitoring service to tell them when one of their domains/sites is inaccessible.

14. Start a directory to list domains for sale. That's what people like SEDO do. You can get money just for allowing domains to be listed in your directory.

15. If you're running a service putting buyers and sellers of domains/sites in touch with one another you could get money for add on services (like providing escrow facilities). For ideas have a look at what existing domain intermediaries offer.

16. Run a domain research service. Wonder what happens when a manufacturer is looking to name a new model car? Or starting a new range of clothing? They need trademark and patent research but now they also need some domain research. Which of the literally thousands of combinations and misspellings (+ <brandname>sucks.com) are taken and which do they need to buy? With a few of the free domain tools discussed on this page, here and one or two more - like free DNS tools - and a little time you could provide them a service they'd pay a lot of money for.

17. Start your own country: Whoa! yes, you're reading it right. If you've heard of Sealand  you'll know that starting your own country is not that far fetched. Once you have your own WhackyCountry you can apply for a .wc (yuk) TLD. Sell millions of domains. Keep some for yourself. Ever wanted a Google.___?

18. Perform domain services for businesses and then send them a proforma (even if they've never heard of you). Explain that it's free this time but you'll gladly keep acting for them for a small fee. For example, there are thousands of big businesses whose half-wit webmasters/ developers didn't put in a redirect from the non-www to the www versions of their sites (or vice-versa). One entrepreneur made a few thousands just from pointing out to businesses how they were losing hundreds of customers every year who were landing on http://xxx-companyname.com and finding nothing there.
I'll talk about domain opportunities some more on this page when I get a chance.

19. Many sites runs on "auto-pilot". A common price these sell for in site-for-sale forums is 12-24 months' worth of net earnings (silly price, but it's true). Provided you don't mess the site up you can recover your capital in as little as 12 months and then ... sell the site to recover your capital again. Double your capital every year. 100% return. Sack your stockbrokers. It really is a crazy world!

20. Site flipping Doesn't require as much capital and expertise as many people believe. Like property flipping, you buy one that needs a bit of TLC. Do it up, then sell it on for a whacking great profit. And, the beauty is you never have to deal with tenants!