This is a bit unconventional, but it's what I call the "Can A Kid Remember and Spell It Test"...

Once you have a name you like, find a kid who is around 3rd-5th grade and tell them the name, and see if they can repeat it back, and spell it.

The most important element of a brand name is that its easy to communicate via word of mouth, and once someone hears about you, they can easily find you.
So, if a kid can remember and spell it, you are good... if not, start over...

The second best piece of advice is DONT FALL IN LOVE WITH A NAME!!! Ego is a business killer, and I have seen so many companies come up with a clever name and fall in love with it, even if its bad for their business.