Well, last year I started a box when I booked the trip. Whenever I went to the dollar store, I limited myself to $5 per trip to Disney stuff (ponchos, wipes, coloring books, travel meds/first aid/ glow sticks, ziplocks, batteries, etc) This helped me spread out the spending. Checked disney outlet for tees biweekly, got several for $5 each. 1 month out 1 made a packing list courtesy of Dis. Two weeks before I started washing and putting the things to the side I wanted to pack, 1 week out started gathering items from around the house (power strip, etc), put together outfits for the kids down to hairbows and undies and bagged them and labeled with name and day, 2 days out everything possible was packed!