Coming from someone who struggles with anxiety and paranoia, the first thing I was told when I went to the psychiatrist was to quit drinking. I am by no means an alcoholic, but I used to go out probably twice a week and I'd also have a beer after work to unwind.
The results were like night and day. All I had to do was not drink during the week and go out less (maybe once every two weeks). You may not be in this boat, but if you are you're doing yourself a favor to cut back.