Tiger,
Congrats on the GFPT, it feels good to take your mates or Mrs up for a local flight doesn't it!
When it came to PPL theory for me I tried to decipher the amount of rubbish found in the PPL/CPL series (ATC). I studied the wrong things but thankfully passed. Best bet is via Bob Tait, clear concise and well covered. I am kicking myself for not using his books earlier.
Best of luck!