Do you buy related domains early on (.net, .org, similar spellings)?
patio11: When I started out I owned just the .com, for years.These days I would seriously buy the big three for so much as a good turn of phrase in a blog post.  (If you're going to coin the next "Long Tail", own the domain and you'll own the idea by default.)  Registering the big three for two years costs far less than writing a blog post does.I don't typically worry about typos or adjacent domains unless they're extraordinarily likely to cause confusion (chinesenewyearbingocards.com vs chinesenewyearsbingocards.com -- I bought that after I was incapable of even writing my Apache config without mixing the two of them).The competitor with every plural variation of my domains can enjoy the extra 10 visits a year he gets from them.  I have better things to do with my time.