UT Has a section for tips for n00bz so why can't CS? Lol. So here it is.
1. ALWAYS try to get head shots. Now this might seem easy, and I also might add, AIMING AT THE HEAD IS NOT a guaranteed Headshot. My tip is learn how a gun's recoil, fire rate and accuracy works and use it. Example, You have a AK-47, now you can either get that ONE-SHOT Headshot, or you can aim lower and CONTROL the recoil, but that's pretty hard.
2. Stick with the team plan. Have a captain who controls it. Most players I play with don't get when to charge, or when to flash or when to camp. I have had to teach many n00bz that camping at the entrance of a choke point is STUPID. Let's say its DE_DUST, and you are Terrorists, you should NEVER wait at the entrance of the tunnel. Either you charge or you camp AWAY from the tunnel. Learn how each map works and how they can be manipulated. A easy guide from me is, rush to the bomb site you feel more comfortable with, IF you have a plan, and some FLASHES and EVERYONE charges at once, NO TEAM IN THIS WORLD CAN COUNTER IT.
3. DO NOT use more than TWO AWP-ers. Now I know most players in Bangladesh and around the world wanna be snipers, now that may seem nice, but having too many AWP-ers is EXTREMELY risky and pretty stupid. I would say everyone use the default rifle, ie. AK and Colt. My advice about Guns would be MASTER the Colt and AK. Pretty much all you need as a start, then move on to the AWP, MP5 Navy and Deagle.
4. Usage of equipment is vital. A simple flash can change the course of a match, and so can a few frag grenades. Using smokes is very overlooked and should be said to be very helpful for snipers and also very annoying to snipers. depends on how you use it.
5. DO NOT have MORE than ONE AWP-er AT ONE POINT. This is something I see when playing, 2 AWP-ers at ONE point, trying to get the easy kills, if someone comes from behind the AWP-ers will die. Try to have them at TWO DIFFERENT points, so the whole map can be evenly covered.
6. CAMP when DEFENDING. When you are the defensive team, why charge? When you know they HAVE to come to YOUR base. DO NOT CHARGE. Just camp at the two bomb sites or the hostage areas.
That's all I have now, I'll give some more soon. =]