http://www.uesp.net/wiki/Skyrim:Radiant#Quest_Locations
Potions (Most common ingredients)
http://www.gamingreality.com/2011/11/skyrim-tips-and-hints.html
Hey Bethesda, Could You Fix Skyrim? | Rock, Paper, Shotgun
The Elder Scrolls V: Skyrim - Reaching the portal - Game Guide and walkthrough
http://elderscrolls.wikia.com/wiki/No_One_Escapes_Cidhna_Mine
Alternatively, an option which allows the player to get both the Armor of the Old Gods and the Silver-Blood Family Ring, side with Madanach up until the Dragonborn is given the Armor of the Old Gods which is at the end of the Markarth Ruins, right before exiting to the city...
Resist Fire + Resist Frost + Resist Poison | Mudcrab Chitin + Snowberries + Thistle Branch |
Resist Fire + Resist Frost + Resist Shock | Fly Amanita + Hawk Beak + Snowberries |