You should never smoke during an interview, at a meal or when you are aware that the other person's pleasure does not include tobacco smoke. If it is an unavoidable delay, try to contact the person. Keep in mind that you never know when you will encounter heavy traffic, wrecks, construction or other delays. Always allow extra time particularly if you are going to an interview. For interviews you should arrive 10-15 minutes before the interview time.
Office parties are good opportunities to improve morale and build goodwill.
Keep in mind these are people you see every day and they will remember a lapse in behavior. Be aware of your alcoholic consumption and do not embarrass yourself. Remember that Please, Thank You and Well Done should be used often. Social skills can help us build more productive relationships. In these changing times, one needs to prepare for a variety of encounters in both the business and social environments.