I'm an INFJ and I'm extremely introverted, but I also suffer from SAD and could never work nights without getting seriously depressed. I come home and I have to have complete quiet- no people around me, no TV or music, and it takes me at least an hour to wind down. I stretch my muscles, stress-eat
, and read blogs on the computer, make lists, or journal about my day. Sometimes I take my dogs for a walk but even that can be too stimulating. If I don't get enough alone time after work I shut down when I have to interact with people. For instance this afternoon some friends were hanging around outside and I went in the house for 45 minutes and forced myself to go out and interact with them but I found myself sitting around like a zombie so here I am inside again!
I wish i knew a better way to relax and process, because sometimes I feel like I'm still wound up at bedtime.