Obviously, smoking, farting, burping, picking your nose, scratching your balls or ass, picking up bugs or gross things and chasing her with them, coughing or sneezing in her direction, chewing on your fingernails, and all other various nasties should be eliminated. I know they are bodily functions, just exercise them with class and tact. Get in the habit of doing this all the time and not just in front of her. If you have to burp do it silently through your nose and blow it behind her while you are talking. Just lean in to her ear and blow it over her shoulder. Or if you aren’t that close, blow it down and away. Make sure no sound comes out. Take your farts to the bathroom or outside and don’t discuss them.