Use Dr. Pete's list. Here you'll find a checklist with the 25 things to consider to ensure the usability of your site.
Use the tools suggested by Riccardo Esposito. For example, domai.nr, to check the domain extension, BustAName, to find interesting combinations, Whois to contact the owner of the domain you wanted if it is already registered.According to copwriter Valentina Falcinelli a good domain name must be: short, or not too long... easy to remember... original, in other words, different from that of your competitors, by being unique and creative. Appealing....positive, fun, evoke pleasant emotions. Catchy. Valentina Falcinelli also advises against choosing names that are difficult to pronounce.