This post was designed for the cultural victory in mind. It lists cultural wonders and improvements ranking within their ages. They are broken into ages because the longer you have a cultural building the more culture it accumulates. Hope it helps!

Rank/Wonder or improvement/Name/Cultural value

Ancient Ages
1. (W) Great Library = 6
2. (W) Piramids = 4
3. (W) Oracle = 4
4. (W) Hanging Gardens = 4
5. (W) Colossus = 3
6. (I) Library = 3
7. (I) Temple = 2
8. (W) Great Lighthouse = 2
9. (W) Great Wall = 2
10. (I) Colosseum = 2
11. (I) Palace = 1

Middle Ages
12. (W) Shakespeare's Theater = 8
13. (W) Sistine Chapel = 6
14. (W) J.S. Bach's Cathedral = 6
15. (W) Newton's University = 6
16. (W) Copernicus's Observatory = 4
17. (I) Cathedral = 3
18. (W) Magellan's Voyage = 3
19. (W) Smith's Trading Company = 3
20. (W) Sun Tzu's Art of War = 2
21. (W) Leonardo's Workshop = 2
22. (W) Military Academy = 1

Industrial Ages
23. (W) Universal Suffrage = 4
24. (W) Theory of Evolution = 3
25. (W) Hoover Dam = 2
26. (W) Intelligence Agency = 1

Modern Ages
27. (W)United Nations = 4
28. (W)SETI Program = 3
29. (W) Cure for Cancer = 3
30. (W) Longevity = 3
31. (W) Manhattan Project = 2
32. (I) Research Lab = 2
33. (W) Apollo Program = 2
34. (W) Strategic Missle Defense = 1

Top ten wonders
1. Shakespeare's Theater = 8
2. Great Library = 6
3. Sistine Chapel = 6
4. J.S. Bach's Cathedral = 6
5. Newton's University = 6
6. Piramids = 4
7. Oracle = 4
8. Hanging Gardens = 4
9. Copernicus's Observatory = 4
10. Universal Suffrage = 4

Yup.. that's about the way to go.

I actually ended up winning a cultural victory by accident. I ended up in what I thought was a losing Wonders battle, because the wonders that gave military/financial advantages kept getting built and I had to switch to more cultural/happiness ones. The Aztecs and the Egyptians were on either side of me, and I was losing my outer cities quickly, then all of a sudden I got a cultural victory.

Still have to get a game going long enough to actually lanch my SS. Only had two games make it far enough where I could even start building the SS.

Great Post!
I just started a new game as Egypt and am shooting for a cultural victory. I figure with the bonuses as an industrious/religious to making all those temples and cathedrals, I should be a shoo in. Right now just racing to get my city number up high enough. The only thing I worry about is the timing of my GA -- what with the Pyramids ranking #2 for ancient wonders and #6 overall. I'll just have to wait and see.