Dry socket can be caused from swishing liquids around in your mouth too much or too hard. You want to keep the hole filled with the blood clot unti it heals. I gently rinsed my mouth after eating with luke warm, salty water. Don't worry about wisdome teeth removal. Get them all removed as I left two of mine. I was told they would not cause a problem. 10 years later they grew a cyst and had to be removed anyway.
Just get them out of the way now and get on with your life never having to think of them again.