Jesus, learning eighty songs in three weeks? Then again when that is all you do, it must be easy. Definitely going to check out some of the programs on it, sounds much better than just reminding the part over and over.
Link?
:P
http://www.premierguitar.com/Magazine/Issue/2011/Mar/The_Working_Guitarist_You_ve_Got_the_Gig_Now_Learn_Those_Songs.aspx (http://www.premierguitar.com/Magazine/Issue/2011/Mar/The_Working_Guitarist_You_ve_Got_the_Gig_Now_Learn_Those_Songs.aspx)
quickest way for me is just spinning the tunes nonstop, somehow my brain memory kicks into muscle memory pretty quick that way