Now that you have accepted the job offer and scheduled a first day of work, make sure you learn some important company policies that affect how you dress and behave.
What should I wear to work? If the information you were given by the company up to now did not discuss a dress code, call your new manager or the HR office and ask. Even if you had three or four on-site interviews and saw what others were wearing, don’t assume dressing just like them will work. Individual managers may have slightly different standards for dress than others. 
In your visits, the employees you saw may have been enjoying a casual dress day, or dressed inn full business suits because they were interviewing candidates. Before you spend money on a new wardrobe, or walk in on your first day and realize you made a big mistake, ask somebody.
If you wore a traditional Western business suit to your interviews, but you prefer to wear the traditional dress or hair styles of your own ethnic or cultural heritage, discuss this with someone before starting work. Religious clothing, such as head coverings for men or women, prayer shawls, and such are likely protected under constitutional protection of freedom of religion. Conservative companies with a strict dress code may balk at your wearing a sari instead of a dress, and you want to know this before you arrive for work and are told you should go home and change.
Skimpy clothing on men or women is rarely appropriate. Bikinis may be the required attire for Olympic female beach volleyball players, but chances are they are not required attire for your job.
Where is my office? Are you sure you even have one? You don’t want to show up with a box of family pictures, art work, and office toys only to discover you are assigned only a locker for personal affects.
What time do I show up? Companies may have all new staff spend their first week shadowing another staff member as part of their orientation or training. The time you are given to arrive on your first day may not be your regular start-time. You don’t want to be surprised at the end of the first week to find out you are actually working the night shift! Find out how you are supposed to record your time and where and when it must be turned in to ensure you get your paycheck.
Where do I eat lunch (or dinner or breakfast)? Hotels and restaurants often provide meals for employees during their shift, but you want to be certain of the arrangement before you show up with no brown bag or lunch money!
What’s the company policy on personal calls or email? Before you share your office telephone number or email address with friends or family, make sure that you understand the protocols. It goes without saying that the office computer is not your computer and you should not be using it for shopping, playing games, or downloading music.
How do I schedule time off? You need to ask if vacation is accrued (earned at a certain number of hours per month) or given in a lump sum. Companies often have policies that prohibit using vacation time during the first three to six months. If you made plans to go to a family reunion or take a vacation before being offered the job, you should negotiate the time off before you accept the position.
What happens if I get sick? Learn the policy for calling in an absence caused by illness. You may be required to provide medical evidence of illness if you are absent for two or more days.