Be friendly and be vocal about it, be ready for small talk. Lubbock Texans are cool like that. Always ask how theyre doin today or something like that. It is appreciated here. Oh yeah, and don't blaspheme (like use words like 'damn', etc.). You're in the Bible Belt, remember.
Lubbock has some of the friendliest peope you will find any place on earth! Be open and friendly to them, and they will return your friendship. Relax and enjoy yourself! Don't be shy about asking directions or suggestions.