Well, you can write down what your phenotypes are (how you look, ex: eye color, hair color, hair type, etc.) and then by using that, you canfigure out your genotypes by researching whether each of your traits are dominant or recessive.
For example, I have a straight hairline, which is recessive, according to a sheet I did a while ago, and this is because both of my parents had the recessive trait for a straight hairline. I also have brown eyes, because brown eyes are dominant in my family.
In addition, you might try some of the following links for ideas and information: