this neat little trick to get familiar w/ spray patterns of the different guns. preferably you should avoid it, but even accurate shots are forced to spray..

make your own server then type these console commands into console

sv_cheats 1

sv_showimpacts 1

now when you shoot something in a red square will appear for 5 seconds or so showing you where you hit. this is great for practicing how to control your spray (especially w/ the ak/m4) also good practice to see where you're shots hit on the other side of doors and walls..

for more tips and such visit http://counterstrikesourcetactics.blogspot.com. lots of useful information.