I'll be doing the following:
1. Identify apps that come on a .dmg. Burn these to a disc.
2. Deauthorize iTunes on my computer.
3. Do a TM backup.
4. Do a clean install of SL. Or maybe I'll do some benchmarks in Leopard and then upgrade to SL and compare.
5. Authorize computer in iTunes.
6. Install iLife and iWork.
7. Restore documents, iPhoto library, videos, scripts, etc a la carte from TM backup.
8. Install apps that I burned to disc.
9. See if the network settings are good.
10. Install drivers.
11. Fiddle with other settings like hot corners, background, color theme, etc.
That's all I can think of for now.