Don’t laugh, but I came up with a minute script which keeps tracers off while shooting, so it won’t distract, and on while you’re not, so that you can see where people are shooting from. I think this is very handy even if you got some superb headphones.
set tracerson "+attack; b_tracers 0; seta vstr tracersoff"
set tracersoff "-attack; b_tracers 1; seta vstr tracerson"
bind mouse1 "+vstr tracerson tracersoff"
Also, here’s one which makes the crosshair smaller while crouching; it’s much more likely you’ll be shooting on long distances then, and in close fights you won’t be crouching anyway.
set crouchon "+movedown; cg_crosshairsize 38; seta vstr crouchoff"
set crouchoff "-movedown; cg_crosshairsize 46; seta vstr crouchon"
bind mouse2 "+vstr crouchon crouchoff"
I just wanted to make a thread about the gameplay of ET for once. 
If you got some clever ones yourself, please post them here.
thats maybe even better than your script