I've been enjoying the blog posts from Rav Menachem at Absolute Truth 613, and I know a lot of you are doing the same.
The other day, he wrote about discovering our mission in life, and one of the ways in which this can be done is by looking at your birthdate, checking what that week's Parsha was, and then finding the Aliyah for the particular day you were born. The easiest way to do this on the internet is by first discovering the parsha of your date of birth, by going to Hebrew Calendar and entering in your birth year and month, then checking the box ''Weekly Sedrot on Saturdays''. Then click ''Preview Calendar'' and you will see the Parsha for the week listed under Saturday.
Now you know your birth Parsha, you can easily find the Aliyah for the day of the week you were born by going to the Chabad Parsha page, Click onto your Parsha, then onto ''text of parsha with Rashi'' [Rashi's commentary may help shed some extra light] - and you will see at the top of the page there are Seven Portions, representing each day of the week. The first portion relates to Sunday, second to Monday etc.
The text you will find there relates to you, somehow. I must admit that finding mine didn't bring me any closer to discovering my mission in life, as I couldn't really relate any of it to my life's circumstances. Sometimes, though, it can be very obvious, and the text will strongly resonate with you.
There is another way to discover what your mission in life is, and that is by looking at the things that are the hardest for you to do. Those things that are the most difficult are the very reason we were re-incarnated - in order to rectify them. For more info on this see Rectifying Past Lives.