Strategies is a way to improve your game trough tips from others. Strategies can be divided
into general which deals with teamplay, communication and similar. Weapon strategies gives info on a
specific weapon and tells how it's used best etc. and finally there's map strategies which describes a map including
sniperspots, chokepoints and so on.
Below is a wide range of strategies in all three categories - some of them located on this site and some linked to other sites.
Remember the best way to improve yourself is through experience...the strategies can only supplement to this.
Keepin´ It Easy - a few basic tips.
Using The Radar - introduction to the radar which is an important tool in the CS world.
Leadership - extensive strategy which takes you through the different playstyles and how to
work together as a team.
Communication - describes the three ways to communicate with teammates; voice, chat or radio messages.
Communication is another important factor in Counter-Strike.
Listening - introduction to the art of listening - learn to hear where your enemies are.
Movement - Use your brains, not your guns, to beat your opponents.
Recoil - Deal with the nasty recoil that affects your aim after you fire any gun in CS.
Silencers - Learn how to take out enemies without revealing your position.
Teamplay - Teamplay is a fundamental aspect of Counter-Strike. Learn it and you'll be a better player.
Clan Fire Squads - tips on using fire squads.
For tips and an overview of sniping positions you should take a look here.