[jdlshore]

Martin Fowler's _Patterns of Enterprise Application Architecture_ is excellent.

Remember, the best architecture is minimal architecture, because architecture is the fundamental, hard-to-change patterns in your code. So learn architecture, but also learn how and when to make it unnecessary.

[gedrap]

Yes, your point of making it unnecessary is really important. When you see patterns, etc. for the first time, it gets very tempting to over engineer stuff.