How to Select a Good Blog Domain Name
To select a good domain name, I suggest these steps:
1. Make a list of words that represent the theme of your blog. For example: mom, moms, mommy, mother, mothers, parent, parents, kids, children, child, daughter, daughters, family, mothering, parenting, training, raising, etc.
2. Try those words in Google Trends to find a term that is popular: http://www.google.com/trends. Compare your terms. For example, type this: “water filters, mom, moms, mommy, mother.” Combine terms if necessary—for example: “parent kids, mother daughter, parenting kids, mothering kids.”
3. See if there is an available domain name for popular terms at http://domain-suggestions
It is more important for your domain name to be a popular term than it is to have a .com name, because most people will find your blog through Google; Google cares about the name, but does not care about the .com part of the name. Besides .com, other good top-level-domains are .net .info .org .biz .us and .tv, in that order.