advice, please

I was having a conversation with Efdumb the other day, and he suggested I might want to put some of my stories into a collection for sale on Kindle.

Its a good idea, but I am stuck on what stories I would pick. I mean, it would probably take 10 stories to make up a decent sized book, and my stories don't tend to be connected to each other directly, so how would I select the stories?

Any ideas, anybody?