I've been thinking recently that launching businesses are likely having difficulty getting their desired domain name or even something partway relevant. It makes me happy to have my own little stash of domain names.
I'll always recommend buying a .com domain, and a .ca domain would be your second choice if you're in Canada. The short, snappy, relevant domain names are mostly all snatched up. I know because I'm often searching for domains for clients or event promotion.
If you're unfortunate to be stuck with very limited options, you might instead opt for a domain name that's more memorable, if perhaps not so easy to guess. The first round of new domain extensions are already live, and more will be launching - in fact, 243 of them!
Here's what's trending for March 2015: (source: Netfirms)
Aside from choice and variety, there's fun to be had, too. How about head.space or illtakeyour.photo or wehave.solutions? Granted, some of them are costly, but not all. And you can pay a fee to reserve a domain name you want, but isn't available yet.