A few pointers:
1. Pace yourself when drinking. There's enough for everyone and it's not going to run out.
2. When gambling, remember that your first loss is your cheapest. Don't keep reaching for more money out of your wallet or worse, head to the cage and take money off your credit card or get a marker.
3. Set a curfew for yourself. There are no clocks in casino's for a reason. Pulling all nighters at the tables and drinking will only increase your chances of substantial losses and feeling really sick for the rest of the trip. Getting a good nights rest every night you are there will make your time in Vegas a lot more fun.
4. Have a blast and meet new friends. Enjoy!