Don't Look at How Much Money Your Friends in Other Fields Are Making: You may be envious of your friends who are earning more money than you are. If they aren't working in the same field you shouldn't make those comparisons.
Do Research Salaries in Your Field: Look at recent salary surveys, talk to others working in your field, and contact your trade or professional association to find out what other people are paid for doing the same work. Remember that salaries differ by geographic region.
Do Consider How Much Experience You Have: Those with more experience can hope to earn more money. Remember to talk about the amount of experience you have if it will help you negotiate a higher salary. If you don't have a lot of experience, be realistic about the salary for which you can ask.
Don't Talk About How Much Money You Need: When you are going through salary negotiations, don't tell your boss (or future boss) that you need to make more money because your bills are high, your house was expensive, or your child is starting college.
Do Talk About The Salary You Deserve: When presenting your case during a salary negotiation, talk about how you will earn the salary you are requesting. Highlight what you have done, or will do, for the company. Also discuss the salaries in your field (based on your research).
Do Be Flexible: When going through a salary negotiation you aren't likely to get the exact amount of money you want. You will probably have to compromise. The trick is to figure out how much you are willing to compromise and what you will do if your boss doesn't offer you a salary you find acceptable.