Appearance and Professionalism

Don't go to work in your underwear / pajamas. This is slovenly, lazy, and unprofessional behavior. Treat your home office with the same respect you would treat a normal office. When you go to work, do so after having showered, shaved, and dressed appropriately.

Clothes define the man (or woman). The difference in your productivity from just putting on a dress shirt and slacks vs. jeans and a t-shirt will amaze you.

Always try to look your best, especially when nobody can see you.