Imagine a character that you would like to write about. Before you include him in the story, take time to write a character study from his point of view.
You must use first person. You can begin anywhere and you do not have to proceed sequentially. Consider it more of a stream of conscious rambling.
Somewhere in the text tell something about his appearance, but do not give a list of features. Mention one or two, just a little something to help us see him as he sees himself.
Put us inside his mind. We want to know what he thinks about things. Consider politics, employment, housing, future goals, but don’t try to cover everything. Only hit the most salient points, those that help you develop him so that including him in a story becomes easier.
Your task is to write at least a page of text. When you reread, ask yourself how much you revealed about him and whether or not there are more things that should be included as well as what should be deleted.
Have fun with this one.