Based on the Marvel Previews #101, January for March 2012, I'd say you need to pre-order the following books in order to keep up with Spider-Man.
Core Titles
Amazing Spider-Man #681
Amazing Spider-Man #682
Amazing Spider-Man #682, variant cover
Avenging Spider-Man #5
Scarlet Spider #3
Spider-Man, Marvel Adventures #24
Spider-Man: Season One Premiere HC
Ultimate Spider-Man #8
Ultimate Spider-Man #8, variant cover
Guest Apps
Avengers #24
Avengers #24.1
Avengers: X-Sanction #4
Avengers: X-Sanction #4, variant cover by Steve Skroce
Carnage, U.S.A. #4
Moon Knight #11
New Avengers #23
Spin-Offs
Venom #14
Venom by Rick Mender Vol. 1 TPB
Reprints
Spider-Man: The Graphic Novels HC
Spider-Man: The Return Of Anti-Venom TPB
Cloak & Dagger: Crime And Punishment Premiere HC
Cloak & Dagger: Crime And Punishment Premiere HC, variant edition
Marvel Masterworks: Marvel Team-Up Vol. 2 HC
Marvel Masterworks: Marvel Team-Up Vol. 2 HC, variant edition
Spider-Man & The New Warriors: The Hero Killers TPB
Spider-Man: Perceptions Premiere HC
Spider-Man: Perceptions Premiere HC, variant edition
Ultimate Spider-Man Omnibus Vol. 1 HC, Bagley cover
Ultimate Spider-Man Omnibus Vol. 1 HC, Quesada cover