If I hadn't gotten a PRN EMT-I spot in medic school Id have been in the same situation minus lifeguard and ski patrol experience.
Listen more than you talk, continue learning and stay up with current evidence, work with multiple people of possible to see different "styles". Take what you like and leave what you don't from each person to build your own "style". Maintain good situational awareness, be observant. Don't work yourself into the ground and burn yourself out. Be systematic but also flexible. Keep a high index of suspicion, "sick until proven otherwise". Be thorough but don't feel like you always have to act. Don't listen to those that say "treat the patient, not the monitor" or "BLS before ALS", use clinical correlation...that being using quantitative and qualitative data provided by your tools in conjunction with a good physical assessment, past medical history and history of present illness to form a complete picture of what is going on. Be confident but not cocky but also be gracious in your mistakes, learn from them and be accepting of constructive criticism. With that said, remember that just because someone has more experience than you doesn't mean they know everything or are correct in their critiques.
Good luck man.