1A.When rushing in a public server, learn the spawns. Learn the routes, and learn the maps. If you want to rush long A on dust 2, but you get a spawn in the back corner... don't try to rush long A anymore. You will be too late to the chase because other CTs or Ts with better spawns will beat you there.

2A.When using the desert eagle, people tend to spam fire the weapon. You have 7 shots only and if you spam them all, you will be lucky to land 3. (the usual amount of body shots it takes to get 1 kill, 1 shot to the head will put someone down instantly, however) Wait about half a second longer and even when running the desert eagle will be very accurate. It will feel like you are going to get less kills, but in reality you will land 3 shots faster with good aim and pausing longer then you would to spam with good aim.

3A. Very Advanced TechniqueWhen trying to assault an awp user, at any real range it is extremely difficult to avoid death. The best tactics to use are to pop around the corner for a half second or less, and pop back. As soon as you hear the awp'er miss the shot, sprint around the corner and try to get a shot off on the head as fast as possible. This takes hard practice and work, but once perfected you will be a force to be reckoned with. Smoke grenades are the best cover system in the game. They don't block bullets, but they are portable. Learn to smoke out common awp spots to avoid getting picked at the same place every time. And lastly, flash grenades blind people. We all know this. But if you blind the awp'er you can easily over take him with 2 or more people, and by yourself with practice. The awp'er will either return to his post after he is no longer flashed if it sounds quiet, or if your making lots of noise (running basically, shooting as well) he will take up the next closest awp post that will result in your death. Learn all the common spots on the map and bring plenty of flash grenades and smoke grenades.

4A.When planting the bomb, plant for a spot that you can easily defend. A great example of this is planting the bomb at the corner of A on dust 2, and then awping defusers from the snake pit.

4B.When defending the bomb, if you cannot awp or snipe from a distance, find a corner or a hidden spot near the bomb. Listen for the defuse sound, assume the defuser has a kit, and use the 3 second rule. If you do not hear another defuse sound after 3 seconds (count a tiny bit fast for insurance) then assume the defuser is going all the way with the defuse. If you do hear another sound then start the 3 second count all over again. Once you don't hear the defuse sound after 3 seconds, pop out for the kill, or throw a flash grenade. The defuser will be blind for the kill, or will force the person to miss the defuse allowing the bomb to explode depending how much time is remaining on the timer. Optionally, throwing the flash at the head of the target will interrupt the defuse.

@ 1a : Dust al rush is a good choice if you rush proper with smokes. The best strategy is to rush 3 ppl al and 2 as with smokes and flashes. Cts cant beat that rush , trust me on dat one (provided that aim should be perfect)Always remember to smoke Ct spwn side while rushing AL. Cts are not meant to chase ,neither do T's . T's rush @ site and plant and Ct's camp and kill .
@ 2a: Deagle is a good pistol but i prefer usp(Ct default pistol). You dont need to pause it if you have a good control . Aim head and kill . Deagle is good in Eco rounds.
@ 3a: Dodging a sniper is not a big deal . Go towards him with a bunny hop and wait 2-3 sec afetr every 3-4 jumps and htry hit head. When he shoots you and misses (80% case) mag takes time to reload, and this is the time when you get him . Smokes are good strategy at magging posis.
@ 4a:Corner of A is not a good spot. N00B spot. Cts from B will put 2 smokes and wil defuse the bomb without even coming in ur sight . Better to plant open in A and 2 go as, 1 stay in boxes and 2 al near to site and keep flashing and nading. Smokes are best to wste time. Its just 35 sec and you will make it easily.If you know how to do a silent plant, nothing is better than that. Using game bugs at tough times in Pubs proves useful
@ 4b:When defending bomb, maggers should not get a corner without ak covering 'em . If he misses a shot , hez dead ! The 3 sec rule is a fail in clans. Cts fake when they defuse for the fisrt tym generally when they dont have backup , they press e near c4 and then unpress it and keep aim at your expected posis.After 3 sec ,when you come out , they will get you easily. Defending c4 entirely depends upon game conditions.

Counter-Strike Tips:
1. Listen Carefully
2. Plan Grenade Use
3. Crouching and Walking
4. Take Cover
5. Try to Work as a Team

IMO First and foremost is the skill. Everything else comes second priority.

And eventually, practise makes one perfect

Very advanced Technique When AWP trying to attack people, no real area is very difficult to avoid death. The best tactic is to use a pop around the corner, half a second or less, and when you return. As soon as you hear missing a beat, sprinting around the corner and try to get a shot off his head as quickly as possible.

Technology is well developed, when you try to attack the annual work plan for any real distance, it is very difficult to avoid death. The best tactic is to use a pop in the corner half a second or less, and pop up again. When you hear skipping a beat, running around the corner and try to get the head shot as soon as possible.

When you use the Desert Eagle, people tend to spam firearms. You turned and only if you spam all you will have the chance to land. The normal amount of body shots it takes to get killed, shot in the head will put someone right away, but wait a half-second longer, and even when driving in the Desert Eagle will very precise.

always stick together with the team mates and take the position at a bomb site

this will help