Literature (DUH)
Monarchy or Republic (DUH)
Printing Press and Democracy (DUH)
Chivalry (Knights)
Military Tradition (Cavalry)
Music Theory (JS Bach is HUGE)
Saniation (Hospital)
Saniation and Nationalism are the only ones I get in industrial age. But if I'm running ahead in tech in the middle ages, I'd get as much dead ends as possible. The computer values them A LOT and you get rip the off for A LOT of money by selling these. What I do is build my wonder half way, then sell the tech to the computer. Then I finish the wonder and the computer just wasted all that money. Worked like a charm in my last game.