Based on the Marvel Previews #89, January for March 2011, I'd say you need to pre-order the following books in order to keep up with Spider-Man.
Core Titles
Amazing Spider-Man #656
Amazing Spider-Man #656, Quesada variant
Amazing Spider-Man #657
Amazing Spider-Man: Way Of The Spider FCBD 2011 Edition
Astonishing Spider-Man & Wolverine #5
Spider-Man, Marvel Adventures #12
Spider-Man: You're Hired
Ultimate Spider-Man #1, Marvel's Greatest Comics Edition
Ultimate Spider-Man #155
Ultimate Spider-Man #156
Guest Apps
Avengers #11
Black Panther: The Man Without Fear #516
Black Panther: The Man Without Fear #516, David Aja variant
New Avengers #10
Ultimate Avengers Vs. New Ultimates #2
Ultimate Avengers Vs. New Ultimates #2, Brian Hitch variant
X-Factor #216
X-Factor #217
X-Men #9
X-Men #9, variant cover
Spin-Offs
Osborn #5
Venom #1, regular cover Quesada
Venom #1, variant cover Siqueira
Venom #1, sketch cover Quesada
Reprints
Spider-Man Newspaper Strips Vol. 2 HC
What If? Dark Avengers TPB