Imo, right sensitivity is most important for good accuracy.
*OBS don't get stuck on others sens:
Your computer specs is vital for your specific sensitivity. Fast cpu, graphicscard and specially what mouse you got depends on the sens.
Also what mouse sens have you set in your windows controllpanel?
Try a sens, let's say 3.0 (5 is default), and go from there. Raise or lower the sens bit by bit. Then play a day with that sens.
Start change the sens in bigger steps - 0.5 at a time then lower it to 0.2 and 0.05 for fine tuning.
This operation don't take an hour it may take days/weeks to find the right one.
If you can follow(track) an enemy fine, stay around that sens or change again.
if you feel that you're always a bit late when shooting then raise a bit and vice versa.
Remember: the sens doesn't have to FEEL good in the beginning, as long as you hit, you're prolly just unaccustomed.
**Check your stats/accuracy/hs frequently!
Myself i use between 1.1 to 1.3 depending on situation (beers or sober) and that is pretty low for most ppl.
My mouse is a Logitech MX518 @800dpi, if i change dpi to max 1600 then rtcw is almost not playable. i can play with sens 0.3 and it still feels fast! (it's an old game ya'll know) + i use a sUrface competition mousemat. (
http://www.func.net)
TIPS:
As i do e v e r y d a y: try aiming on things like a corner or a MG42 or a lamp on the wall. Follow it while moving.
Practice makes perfect!!
P:S don't go look at my hs/accuracy for this week, i've used the venom + some