Screen becomes soooo much more usable after you append the following to your screenrc file (or .screenrc, depending on distro). Adds a convenient F11/F12 for right/left jumping of screens, with a convenient bottom status bar:
----------cut below-----------
# Bind F11 and F12 (NOT F1 and F2) to previous and next screen window
bindkey -k F1 prev
bindkey -k F2 next

# Pretty status bar at the bottom.
hardstatus alwayslastline
hardstatus string "%{gk}[ %{G}%H %{g}][%= %{wk}%?%-Lw%?%{r}(%{W}%n*%f %t%?(%u)%?%{r})%{w}%?%+Lw%?%?%= %{g}][%{B} %m/%d %{W}%c %{g}]"
--------cut above----------------------

# Use ` instead of Ctrl + a
escape ``