Just read this nice article on corporate manners for freshers and thought i should post it here.

Here are some corporate manners for freshers that would definitely add more competence to their caliber.
Always enquire about the timings of arrival, departure and breaks if; you are not informed beforehand
Follow the Golden Rule in a corporate ” Never Be Late.”
Your dressing is an expression of your attitude. Enquire about the company dress code or simply observe your would be colleagues. Dress positively to boost your impression.
Express a warm greeting to the receptionist whenever you pass her/him. He/She knows everyone at office and would help you to build office relationships.
Learn the office layout from the receptionist through casual talks.
You can find somebody in your team who you can rely upon and seek help from them during emergency cases.
Maintain a proper sitting posture.
Never personalize your cubicle with family photos and other little accessories.
Keep your personal calls to the lowest possible number (Read it as zero) during the first few weeks. In addition keep the ringer volume low yet audible to you.
Do not use office e-mail or surf the Internet for personal purpose.
Try to solve your duties rationally and never depend too much on others.
Never postpone your duties to the next day.
Be willing to extra duties or help your colleagues. However more importantly, know when you have to say the word “no”.
During lunchtime ask your colleagues to join you or go to the lunchroom for food. This will enable you to interact with people from other departments too.
Never give out too much personal information about yourself to everyone. At the same time never be too inquisitive and gossip about others.
Always update yourself with knowledge of business and competition by reading journals, watching programmes, discussions etc.
During the first meetings and presentations share ideas but; keep your opinions to yourself.
Always keep eye contact with others while talking.

Well hope these tips helped