Unless you've just won the lottery, you probably could use a little extra money in your paycheck each week.

However, do you know some of the tricks of the trade when it comes to bargaining for a raise? While circumstances may differ from employee to employee, Ruth to the Rescue spotted some advice that might help you boost your pay.

According to salary.com, the first step is to know when your company evaluates employee salaries. Then, approach your boss at least one month before that date to start discussing the raise you'd like to see.

Before you have that conversation, do some research. You should know what other employees in your area are making in similar positions. Also,come up with a list of reasons your performance is deserving of a raise.

The managers at salary.com suggest you avoid using life events (buying a house, having a baby) to justify the pay increase. If your boss says he/she cannot give you the bump in pay you desire, think about negotiating other perks like extra time off or bonuses.

Before you leave that meeting, be sure to ask what you can do to deserve a raise (or a better raise) the next time around.