I've really enjoyed reading Ivan Moore's Programming in the Small series. Lots of really nifty observations on how to improve your code a little bit at a time. My favorite quote thus far:

Another "programming in the small" style thing that I often see, even by people who understand non-interacting fermions, are conditionals that are more complicated than they need to be....

    	public boolean isWhatever() {
		if ( someCondition() == true ) {
			return true;
		} else {
			return false;
		}
	}

Must control fist of death.