In response to what you were initially saying...I think you might be taking the list's suggestion a bit too literally. To 'find meaning in your life' doesn't necessarily equate to having some big, overarching purpose for existing...I don't think there are many people who actually have that.
In the class, the presenter described it more like 'something that gives your life direction', something that you use to decide what you should and shouldn't do, or what you will and will not do. Even something as simple as a basic moral system can be a meaning in your life, if you really believe in it.
I guess it's easier to illustrate the point by suggesting the opposite: if you don't have ANY sort of meaning to your life, then you'll either (a) do nothing, or (b) do anything. Particularly, anything that anyone else tells you to do. If you don't make up your mind, someone out there will try to make it up for you, and they may not have your best interests at heart. That's why it's good to have an internal value system: at the very least, it'll make sure that you only do the things you want for yourself.