Finally learn what type of environment and culture you have landed in. Is it a casual free flowing atmosphere? Possibly a very rigid structured organization. Learn what your manager expects and what style of boss they are. Then take appropriate steps to meet  then exceed there expectations. A good mental game here is to learn to view your boss as the customer and you as the salesman. It is your job to figure out what they want and need (even when they may not know). Want a few tips on handling that difficult client (boss)

The Micro-Manager (controlling, overly involved)
Sales Strategy: Your boss needs to develop more confidence in you. Begin by asking for complete responsibility on smaller tasks and then work your way up to bigger tasks. Be sure to deliver consistently excellent work or you may lose that trust quickly.

The Non-Manager (indecisive, hesitant, vague)
Sales Strategy: Instead of asking open-ended questions, give him a few choices and one clear recommendation. Counteract vagueness by asking for clarification. Avoid procrastination on your boss's part by communicating your deadlines and following up on what you need.

The Unreasonable Manager (crushes you with work)
Sales Strategy: Schedule a meeting to discuss priorities and options for what you can and cannot handle. Suggest bringing in a contractor to help during peak periods.

So Step 3 is treat your manager (and company) as if they are your best customer. One other page borrowed from the sales mentality -- the Art of Self Promotion. In some workplaces it is not only smart, but crucial, that you learn to blow your on horn. Don't forget that a healthy sense of pride for your own accomplishments is a good thing. Always recognize excellence and extra effort in everyone else. Give honest praise to you other team members, when deserved but don't downplay your own contributions.