If you have recently started are about to start a new job, then you may worry about being the newbie again. It may be that you have been in your previous role for some time, or this is your first job so are not really sure what to expect. It is important to remember that first impressions make a difference, and it is hard to change someone’s opinion of you once they have made their mind up. For this reason, try and go in showing everyone your best side. Be sure to be punctual and polite and that you dress smartly, especially if you are in an office or retail environment. No one expects you to know the job inside out straight away, so it is fine to ask questions. Often people prefer it when you ask questions as this shows that you are taking an interest and trying to learn.
If you are going in to a management role then you need to be sure that you have authority but don’t go in too heavy handed on the first couple of days as you may make some enemies. You can be a great boss whilst also being friendly and approachable, it is all about getting the balance right.