Board Thread:General Discussion/@comment-89.150.171.32-20130418215342/@comment-4057437-20130806035846

We have found that one can get Companion's Insight very early if work is done on sneak and alchemy. Sneak is obvious, alchemy is to make invisibility and fortify sneak potions.

Invisibility potion: Luna Moth Wing + Nirnroot (both can be collected outside of Whiterun).

Fortify sneak potion: Abecean Longfin + Purple Mountain Flower (again, easily obtained).

Making enchanted items with fortify sneak helps as well.