[Seaside] How to accelerate learning of Squeak environment?

[itsme213]

While I am getting comfortable with the basics of developing Smalltalk code 
in the Squeak environment, I still don't have a good handle on things like 
change sets, images, versioning (monticello), pool dictionaries, sunit, 
customizing (even things like keymaps, fonts...) etc.

Any good sites / books / other pointers that might help?

Thanks.