All really good suggestions here.
I built a 50x60 shop last year. here are a couple things I think I did right, at least for my needs. I'll leave out the things I screwed up!

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- split mine into 3 separate areas (to control heat in all 3). 1) large 30x50 cold storage; 2) 30x30 oversized 2-car garage/workshop with heat to keep snow melted off sleds, etc.; 3) 20x30 man-cave with bathroom, including urinal, fridge, sink, kegerator. Heated to comfortable room temp.
- bright, bright lighting
- OSB sheeting on all walls (except man-cave, which is dry-walled)
- floor drain in garage bays
good luck!!