As the others have said its all about making the right impression.
1. stubble is NOT a good look.
2. Arrive at work clean and tidy. You are representing the company
3. Be first at work and last away from work
4. Listen and if you dont understand ask. We all prefer to be asked a question rather than have to put right a silly mistake that could have been easily avoided.
5. Expect to be given a hard time sometimes. Its not personal but if the guy(s) you`re working with are under pressure you may get some fall out. That is life.
6. Look for work. Keep your hands out of your pockets. There is ALWAYS something to do.
7. Mobile`s are for bait time
8. Talk to the guys at bait time, some can actually be quite interesting
9. Learn to make good tea.
10. Expect to be knackered, you`ll get used to it. But at first it can be very tiring.
And lastly enjoy yourself, have a laugh and a joke on site. Nobody likes working with a misery guts.
Good luck