Here are some fluxbox key bindings, held in the file .fluxbox/keys. They allow me to easily switch windows and workspaces, manipulate windows (close/minimize/shade/move/resize) and open programs.
Mod1 Tab :NextWindow Mod1 Shift Tab :PrevWindow Mod1 F1 :Workspace 1 Mod1 F2 :Workspace 2 Mod1 F3 :Workspace 3 Mod1 F4 :Workspace 4 Mod1 F5 :Workspace 5 Mod1 F6 :Workspace 6 Mod1 F7 :Workspace 7 Mod1 F8 :Workspace 8 Mod1 F9 :Workspace 9 Mod1 F10 :Workspace 10 Mod1 F11 :Workspace 11 Mod1 F12 :Workspace 12 # Program control. Using the windows key. Mod4 Control c :Close Mod4 Control q :Close Mod4 Control m :Minimize Mod4 Control s :ShadeWindow Mod4 Control r :RootMenu Mod4 Shift Right :MoveRight 10 Mod4 Shift Left :MoveLeft 10 Mod4 Shift Up :MoveUp 10 Mod4 Shift Down :MoveDown 10 Mod4 Control Right :ResizeHorizontal 5 Mod4 Control Left :ResizeHorizontal -5 Mod4 Control Up :ResizeVertical -2 Mod4 Control Down :ResizeVertical 2 # Apps. Using the windows key. Mod4 a :ExecCommand aterm Mod4 n :ExecCommand nedit Mod4 g :ExecCommand gvim Mod4 e :ExecCommand eclipse-3 Mod4 r :ExecCommand rox Mod4 f :ExecCommand firefox Mod4 t :ExecCommand thunderbird Mod4 x :ExecCommand xterm Mod4 m :ExecCommand xmms Mod4 v :ExecCommand aumix Mod4 w :ExecCommand wmmixer Mod4 o :ExecCommand ooffice2 Mod4 s :ExecCommand Find
See Chapter 5. Key Bindings of the Fluxbox documentation and the Fluxbox Keys section of part 3 of the Gentoo The Fluxbox Configuration HOWTO.