In your point "Communicate with the client or project leader regularly" it's really necessary that both the customer and the designer talk about the same thing.

In your point "Communicate with the client or project leader regularly" it's really necessary that both the customer and the designer talk about the same thing. Everybody knows email loops with explainations "which button should be more blue". Usersnap - http://usersnap.com http://usersnap.com - offers visual feedback to speed up your design process even further. (Full disclaimer: I'm one of the Co-Founders.)