Many Tarot books and readers warn against reading for yourself.
The common thread in this argument is that it is difficult to be objective and that one tends to see what one wants to see rather than what is really there. That is a real danger, however I think reading for yourself can be most helpful, particular in seeing options that you might not have come to on your own.
You have to keep all possible meanings in mind when reading for yourself and then decide which one fits best realistically, not hopefully.
Reading for yourself can help you change the outcome of a situation, by showing you where things are headed presently and what you can do to change them.