Recommendations for a little LTSpice design project?

Well, one of the advantages of getting a new Windows 7 laptop is that I now have a much nicer environment for running LTSpice. Does anyone have any ideas of a good, simple project that I could do to help me learn the ropes of LTSpice, and which I could also build for real to test my understanding? Perhaps something like a VFO + buffer amplifier + power amplifier chain, that could be done in steps? The simple transmitter in EMRFD would seem to be a reasonable choice, but the oscillator is crystal controlled, and I’ve heard that LTSpice can have some difficulty simulating these kind of “high Q” circuits.

What would you all suggest?