i have 17 days as well...i've been packed for months now (not much use for shorts in new york in January...) I regret it now! i feel like so much of a disney vacation is preplanning until your fasts plus reservations are made (snagged anna and elsa...yes!) then you have a torture filled three week period of nothing to do but wait until you can check off another day on the count down! I feel like this might be on purpose to psychologically give you a bigger sense of happiness and accomplishment when you do FINALLY get there...and as a result gleefully spend more money...(maybe not, but if so...i wonder how much Disney spent to figure out how to do that...)
all that being said, i have been spending all my free hours studying the food (mmh, snacks!) the layout of the construction walls, and watching youtube surprise reveals. hopefully you find one of those ideas will help you....

and maybe we will pass by each other in the parks!