-GET TURTLE BEACHES(you dont know how many kills these have gotten me)

-LOOK AT YOUR RADAR(it amazes me how many people dont use there radar to look. uav something thats only a 3 kill streak is so useful but yet i find that i still can get stealth like kills when the enemy has uav and i dont have cold blooded.)

-RELOAD(this is self explanatory but if your in a spot where your almost sure no one will kill you in the next few seconds, reload, you never know when 5 shots will make the difference.)

- FIND A CLASS YOUR GOOD WITH(some people are great snipers, some are good at running in with a knife and others are good at picking out targets with a famas or m16)
-USE YOUR SPECIAL GRENADES(when you turn a corner that might have an enemy throwing a stun will tell you if one is there and will give you an advantage in the fight. also when running across large, exposed areas a smoke will help you get across with out being an easy target)
-PLAY ON TACTICAL(i dont know why people use the default button layout because think about it, your gonna need to crouch alot more then knife and getting into the habit of drop shotting helps alot.
-AIM DOWN YOUR SIGHTS(i use to fire from the hip when i would be nervous on a high kill streak and someone was right in front of me and time after time id die. always remember to aim down your sights even when your close.(unless in an easy knifing range))

If you have any more to add to this list leave them in the comments below