Learn your abilities. Use your taunts to keep agro on you and not your companions. Learn how to mitigate damage when you need to toss up a saber ward or Invincible; don't just slap it on at the start of every fight. Use Backhand, Force Push, and Force Choke to break combat and allow you companion time to heal you. Endure Pain is a great emergency heal.
Develop a comfortable rotation on you abilities. You don't like to watch cooldowns fine...but then you need to develop a logical rotation that will bring them off timer in the most efficient manner. Just hitting any old attack that is off timer will waste rage and be very ineffective. Once you have a system, you won't have to watch.
Quinn, ftw. Others may DPS better but until you are comfortable have Quinn keep you upright.
Target selection... take down the easy one's first. It might take 30 seconds to drop the Elite and 10 to drop each of his buddies. Drop the buddies. You will take less damage if they are down when you focus on the Elite.
Discretion is the better part of valor. Some fights are unwinnable. Avoid them.
Stims are a nice boost. Use them accordingly.