[nandemo]

Such a high turnover is a major red flag. Still, if you want to take a self-evaluation take a look at this programmer competency matrix:

http://www.indiangeek.net/wp-content/uploads/Programmer%20co...

It is by no means authoritative but it could be a start for you to brush up on weak spots.

[ayers]

That is a great skills matrix. I have some set learning goals for myself(outside of work) this year and this matrix just confirms that I am heading in the right direction.

[dreamdu5t]

That's an amazing matrix. It deserves it's own post.