Confuser, Confuser, Confuser. Buy it!
Read a book - I use Thom's, but there are others - and make brief notes (couple of pages per chapter). When you're done with that do the Confuser practice exam. Look at what you got wrong, try and understand why, go back and learn it. Repeat as required.
With Air Law there is a lot of information to learn and you cannot easily guess answers - i.e. a typical question is
[quote]
Unless authorised by ATC, an aircraft operating below FL100 under VFR or SVFR in class D airspace must carry
(a) VHF radio, transponder modes A & C
(b) VHF radio only
(c) VHF radio, transponder modes A & C, VOR
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(b, in case you care). There isn't really an alternative to just learning stuff like that. However, the confuser is a big help to getting an idea of how much you know - and there is a certain similarity between the confuser questions and the exam... <img src="wink.gif" border="0">