Be early and suitably dressed.
Treat your first day almost like the interview; prove to your new boss they made right decision.
Bring a note pad and write down everything.
It demonstrates an eagerness to learn and will help you feel more confident later if you forget the door access code or people’s names. You should be listening and learning a lot more than you are talking.
Ask your boss insightful not trivial questions.
This is an extension of a first impression so stick to business subjects. Your peers, teams or support staff will be able to point out the coffee machine.
Call your recruiter to let them know how it went.
Talk through the people you met, the project and how you found your first day. It’s important to share any questions you may have at this early stage and your consultant is best placed to find out information on your behalf.
Give it a chance.
It you feel you've made a mistake, don't panic. It takes time to settle into a new organization and team.