It depends on what you've got already really - when you consider your stash do you have any 'holes' that need filling? If you already have a load of batting and blenders then you may want to explore getting notions (like rulers) that you wouldn't normally get but fancy trying, and/or print fabs from a favourite designer. Do you like scrappy quilts or matched ones? Is now the time to get fabric from a collection to make a matched quilt, or do you just want to go wild and get a little bit of what you fancy?
If it were me I would be wanting to blend some practicality (what do I actually need) with some fun (what do I just WANT - you know, when you look at a fabric/item and have a gut reaction even tho you have no clue what you'll use it for. Or when.)
If you're feeling a bit 'oh, where do I begin?', then maybe start with the practical hole-filling first!!
I'm very envious - have a lot a fun, and let us know what you end up with!!