One of the things that has proved surprisingly frustrating for me has been trying to identify the various connectors that are available, and which ones are appropriate to use. For example, I bought a cheap stepper motor for a small project. The motor comes with a small white connector attached to the leads, but I've had a lot of trouble trying to find a mate for it that would work. In the end, I just cut the connector off and soldered the leads to the board.
Is there a good reference somewhere to help me identify connectors, and also is there a similar reference that recommends the type and size of connector to use for original designs? Flipping through the Mouse printed catalog, I'm a bit overwhelmed by the variety of choices, and there's clearly a vocabulary that I don't yet have.