* You should really read the screen(1) ManPage -- the program is chock full of useful bits. 

 * <tt>screen -rx</tt> allows to to attach to an existing screen session, even if you are already attached to it from another terminal. 

 * If you use Ctrl-A a lot and don't like screen catching this, you can change the key used for this by adding <tt>escape ^ss</tt> or similar to <tt>~~/.screenrc</tt>. The first character, <tt>^s</tt> defines the escape char, the second character is what you press after an escape to send a literal escape sequence. 

 * The documentation is not quite clear on how to launch processes into new windows in a running [Screen] session. The <tt>-m -d</tt> switch combination advertised for launching processes in detached mode creates an entire session for each of them. If you want them running in an existing session, you have to send that session the <tt>screen</tt> command. Sending commands to a session from the [Shell] is done by invoking <tt>screen -X ''command''</tt>. Effectively, this means that you launch a batch of wget(1) downloads in a screen session by invoking <tt>screen -X screen wget ''$someurl''</tt> in a loop.