1.Start 2.Find a non-noobish buddy 3.Follow him (unless he is obviously running in the wrong direction) 4.Cover him 5.Let him die. :p 6.Kill those who killed him. 7.Look for more enemies and do 'em. 8.Along the way if you find another non-noobish buddy, well, follow him too. 9.Resume to 4.
In the event of you being alone against the rest of team, switch to John Rambo mode.
1.Start=>2.Scan for Enemies at start=>3.Predict enemy spawn =>4.Take a Position or Charge=>5.Engage=>6.Scan for more enemies or Fall Back=>7.Engage=>8.Go back to #4.
