Never indulge a bad thought, because thought become deeds, deeds become habits, habits become nature, and nature become YOU. Ethics is something that you either have or you do not. It something like you cannot be a little pregnant or a little dead. Either you are, or you are not. And do not kid yourself, thinking that others do not get the whiff of it. If you behave without integrity, other will know and you will be respected much less.
Be always known for being truthful and straightforward. These are qualities that will take you very far in life.
Do not side wrong dongs, even if they are popular in the new job. It is better to have another job if things are that bad another job if things are that bad - do not have your integrity compromised. Be known for truth and honesty. This applies to small as well as big things in life. Create a reputation of high integrity - it will promote your case beyond your wildest expectations.
Speak politely to one and all. Everybody can be polite to a king, but it takes a real person to be polite to a beggar.
Do not pilfer office stationery or anything else as a matter of fact. Stealing is stealing, if it is small or big. Bad habits not only catch fast, they also corrupt one's personality. Do not allow temptation to harm your psyche.
Be careful not to joke about anything that can hurt anybody's feelings. Specially, be careful about any type of promotion of racism, anti-Semitism and the like. Respect people as they are all human beings - the most beautiful creation of God.
Respect your colleagues - men and women in equal measure. If you are a man ensure that you never crack sexist jokes. Do not encourage or tolerate others who do it either.
Do not be scared of working hard. If deadlines are demanding, work overtime. Ensure that your work is as qualitative as quantitative. Also, remember that it is as important to work smart, as to work visibly. Getting the work done is great - but letting it seen that it you work hard is as important.
If you have to go on leave, give sufficient notice to your superiors and peers. Arrange that all your duties will be taken care of - ask the help of your colleagues and offer similar services when they would need it - and ensure that work will suffer the least due to your absence.
Never absent yourself without informing. If you are facing any type of emergency - it is okay, things happen to anybody - however, inform your workplace as soon as you know that you are not going to make it to the office.