Spitfire 2002-
I am currently undertaking my ppl in the UK (now post solo). As the weather is now on the iffy side, I'm in the process of getting all my ground exams out of the way. I work full time (plus family with 2 young kids) but am managing to rattle them off at the rate of one every 2 or 3 weeks.
Read the Thom books. Reread them and then do the self-tests in the back. Do the questions out of the PPL Confuser book. When you are getting 90% plus go sit the exam and then move onto the next one.
I agree with Rusty Cessna that Air Law, Met and Human Factors are the ones to get out of the way first. I am now revising for the Nav exam, and whilst my limited flying experience has helped understand some of the concepts a little better, I think you would manage to get through OK without this.
Getting 3 or 4 out of the way before you go to the States has got to take the pressure of you whilst you are out there.
Mr Wolfie