This is what I think I think... for now:

1. IT
2. Wizard and Glass
3. The Gunslinger
4. Different Seasons
5. The Shining
6. The Stand
7. The Drawing of the Three
8. The Dark Tower
9. Lisey's Story
10. The Wolves of the Calla
11. Salem's Lot
12. Susannah's Song
13. The Wastelands
14. Under the Dome
15. Insomnia
16. Everything's Eventual
17. Pet Sematary
18. Desperation
19. Hearts in Atlantis
20. Black House
21. The Eyes of the Dragon
22. The Regulators
23. Bag of Bones
24. Skeleton Crew
25. From a Buick 8
26. The Talisman
27. Dreamcatcher
28. Night Shift
29. Cell
30. Rose Madder

Everything else I need to read or, in the case of On Writing and The Wind Through the Keyhole, need to finish reading.