Once you have picked a broad topic and narrowed it down to “one problem one solution”, as you did on Day 1, you need to pick a domain name and register it.
But how do you pick a domain name, first of all, and then how do you register it?
First things first.
How to Pick a Domain Name
There are 2 schools of thought about picking a domain name. Remember, your domain name is the URL of your website, so it should be 1) easy to remember, and 2) easy to type (i.e., shorter is better).
Way 1 – use your keywords to make up your domain name. If, for example, the “topic” you wound up with from yesterday's exercise was “house flipping”, then you might seek out a domain like www.houseflips.com.
Way 2 – brand your website. That is to say, if your company name is ACME House Flipping Company, you might look for a domain like acme.com. Or, if your name is Jeb Eubanks, go for a URL like jeubanks.com.
(There is a third way, by the way – combine elements of the above 2 ways; for example, acmeflips.com)
Long story short: Go the branded route. While I don't believe there is a definite Google penalty for “exact match domains”, there is a considerable number of experts in the know who believe there might be. Why chance it, right?
How to Register a Domain Name
You need to go to a domain name registrar and “buy” your domain there (you're really renting it because you have to renew it periodically, most often yearly). I have tried quite a few domain name registrars over the years; I use Namecheap exclusively now.
Here's how to register a domain name.
Just follow those simple directions and you're all set.