Avoid The Death Trap
No one likes to see their teammate get shot out, but the difference in a skilled player and a non-skilled player is the way they use the information provided by their eliminated teammate. Now we all know that dead players are not allowed to talk, but you can easily use gathered information from that player without even conversing or breaking any of the rules!
For instance as soon as I see one of my teammates get eliminated I look for the actual hit or hits that eliminated them, and hope that I can see those hits before they are shot a few extra times. The shots on the player literally can tell you a whole story and that story should dictate what you should do next.
Identifying the shots on your teammates will make your survivability rate increase, also it will increase your field awareness and decision making skills during matches. It is a skill that takes a lot of practice to learn, and also a good understanding of the layout you are playing. Sometimes you will know the field so well, that you'll easily be able to identify where the opposing player is without even seeing him.