as stated there. this is Counter Strike tutorial.
1. Play with people who are a little bit better than you
if you play with people that are horrible or people that are much better than you, then you're not learning anything. As you get better, move up servers.2. Remember to close memory and bandwidth consuming applications
(IE: MSN, AIM, Limewire, etc.). If you experience lag, then try contacting your ISP or try fixing it in some way. If you lag in Counter-Strike, it can greatly alter how well you play.3. ALWAYS aim at head level
try to aim upper chest. it will give great damage to the opponent.4. Know where and when to throw a flashbang.
If you throw it straight in front of you it will blind you as well. So, always throw flashbangs on corners or after throwing it hide behind some wall or obstacle and make sure it doesn't come in your view and try not to waste it throw only if you know there is someone but you can also throw it to ensure your safety such as throwing it into bomb site before moving in and defusing or planting.Often terrorists hide nearby the planted bomb and wait for there prey to come !5. Learn what walls and boxes can be shot through.
Maps like de_nuke are very good for learning how to "wall" efficiently. when enemy got poked while they don't see from where you are, they will became confused. For you, for surely, you will know their location.
These all are the simple FIRST PART of tutorial @ GSE wait for more.
source : wiki
