Speaking of books: Games people play by Eric Berne was an eye-opener for me. If you want to find a logical framework to wrap your head around social interactions, it is a useful book.

For me at least, I found that watching comedy series helps a lot to figure out social transactions. As a positive byproduct you learn to make jokes, which can also help in your pursuit to become socially appropriate.

I also find that if I stay away from computing for a while, I tend to get more normal.

Putting an effort into dressing acceptably (clean, fitting clothes), getting regular haircuts, figuring out how to chit-chat, generally smiling and nodding are my current strategy to fit in.