This video shows how to build a strong shed foundation yourself, even on sloped ground, without paying a contractor to do work you can learn. It covers layout, leveling, stepped 4x6 framing, rebar, ...
Opinion
Andrew Thron Improvements on MSNOpinion

This shed foundation works even when the ground is bad

This project shows how to build a strong shed foundation on either flat or sloped terrain using pressure-treated timbers, stone, rebar, backfill, and compacted gravel instead of a traditional slab.