I don't really have any fancy or expensive gadgets that I use. These are the items that I always use:
Rada Cutlery Deluxe Vegetable Peeler. It's the best peeler I've ever used:
A graniteware roaster like this one, that was my mom's:
A 9 3/4" slicing knife from Cutco that was my mom's.
My mom's Feemster slicer (noticing the pattern here?

)
The LUX Color Changing Egg Timer: