Pallet uses:
Fast unloading after coming home from a shopping trip (especially when it's a large quantity, or large/heavy stuff - tend to put a pallet in the back of my truck for this purpose when going to buy such things),
work platform/impromptu scaffolding for low heights (e.g. not much more than truck bed height),
portable toolbox/long handled garden tool rack (haven't gotten to building either of those two just yet, but it's planned)
platform for moving planted pots (much like a carry all)
a spacer between the wheel wells in my truck bed so I can transport objects that won't fit between the wheel wells
storage of implements (mostly those where accessing them or other items requires shuffling things around)
Pallet fork uses (not already covered elsewhere or inherent to the designed purpose):
impromptu work bench (used for mower blade sharpening in picture)
lifting partially assembled carport (pre-lift in picture) for final assembly

light weight extended reach lifting either with a strap on the forks directly or extending the fork tines with a piece of lumber/pipe that's securely fastened to the tine(s) ...while I don't have a picture as part of that carport assembly I also used the 4x4s as extended tines to lift/hold some of the other pieces for assembly