How to alienate yourself on the new job
The first thing nobody wants to hear is that every sentence start with "I". When you talk about your achievements in your ex company, start with "We..." Everybody wants to hear about your achievements - as a group, not as an individual. If you are talking all the time about yourself, your new colleagues will start to ask did anybody else did anything. It also shows narcissism, which is good to some extent but not if you are going over the edge.
Another bad thing to do is to brag around with names. "I know the man, will call Joe" is a typical sentence that will earn you strange looks just like that. You don't want to look as a celebrity hunter, even if you are home friend with Jack Welch, you have to get things done and your friendship doesn't belong at the first place in conversation with others.
Now, "OK, let's do this my way" is something that might work in your old company, but in the new it's better to say "I have an idea" because you should remember that you are new and there is a long way to go until you show results and earn trust. And that stands true for all employees, from the factory floor to top management: Show me good results first and then you may start with "your way".
Another bad thing on the new job is to promise too much, hoping that you will make it. On the new job, you should always start withing your limits, gradually trying to lift them. No matter how enthusiastic you are - and your new colleagues may see that - results are what matters at the end of the day. If there are no results, you will be in the "He's just talking" group very soon.
And just one more thing: gossip. When you start in a new company, you definitively want to learn everything about it and the people in it. However, pay attention to "She is..." or "He always..." Make distinction in your head what your new colleagues say about other employees and don't be caught in personal preferences. Focus on what people do, not what others are saying about them, and stay away from company's gossip game. ■