I haven't had much luck with study guides either. Hard working students memorize the study guide as their only resource and wonder why they don't do well.
I was inspired by Jennifer Findley who posted several Jenga games on her blog Teaching to Inspire.
I found mini Jenga games at the dollar store and made questions to match the test.
Next I need strictly vocabulary practice. I searched the internet (and teacher sites) but haven't found anything that fits. I'm thinking about a crossword, word search or bingo....