<human>: Summarize the given text in a few sentences.

This week, two unpleasantly surprising things were brought to my attention regarding my compensation at work.  

1. A friend at work discovered the internal guidelines for salaries, and when I checked mine out (I can only see the entry for my title), I found out that I am making considerably less than the "target," which is the internal estimate for the average salary in comparable positions at this and other companies. (about 10% less)

2. A coworker who has a bad habit of saying more than he should mentioned his base salary.  It was about $5k a year more than I make.  Here's the problem:  even though we've been at the company for about the same amount of time, his performance has been really poor.  He has previously discussed at length how he was placed on a "performance  improvement plan" with a 45 day deadline, and the fact that he BARELY survived it.  

My annual review last year was really good - I got a lot of praise and a few small suggestions for areas I could improve.  I got a pretty small raise (which seems standard based on discussions with some friends at work.)  I've worked hard this year to make the requested improvements, and have taken on a lot more responsibilities as well.  Meanwhile, my coworker has slacked off again since getting the all clear.  As a result, I AM PISSED.  We have some other coworkers who are generally pretty good, though I feel like I rank very high among our group (top one or two performers.)

  My annual review is coming up in a few months again, so I have a few questions and could use some advice.

* When should I ask for a raise?
* Can/should I bring up the two points from above?
* Will asking for a raise before my review negatively impact me at work?
<bot>: Shitty~~ Underachieving coworker is making a lot more than me and doing a lot less work.  Found out that my salary is a lot lower than the internal guidance.  How do I fix this?