Do not get too friendly with bosses or coworkers. Remaining professional is in your best interests. These friendships may lead to drama and gossip which will be detrimental to the workplace. If you keep these relationships on a professional level, you will not risk your job over things that are not related to the company.
Keep in mind a resume is just one thing you need to impress with. Make sure that your resume is completely up-to-date. That said, there's more to the process than that. Employers want people who can further the business, and improve on it. Take the business opportunity time to think about your strengths and skills so you can draw attention to these things.
Dress appropriately for your job interview. Be certain to pick appropriate clothes and make sure to pay attention to your personal grooming. You want to make the best first impression possible as this carries a great deal of weight with employers.
Make sure you obtain an email address that sounds professional. This is the first thing that an employer will see when you email them. Select an easy address that includes your last name. You wouldn't want to rob yourself of that dream job just because you've got a silly email address.
The current economy has made finding a job not the easiest thing in the world. Don't give up on yourself when it's hard. Learn about employment and use the advice you read here.