I read in my decks companion book (but don't know how others look on it, or if it is even accepted as truth) that the number of major and minor arcana cards in a reading signify how much control you have over what is to happen...
For instance, if you have more Major Arcana cards than Minor, fate is more in control of what's happening, or is to happen than you are at that time - if there are more minor arcana, then you've got most of the influence on your life and path...
There is a point to this, really... Here goes:
So I guess my take on how to read the future cards (using ths major and minor arcana theory) would be to look at the card meanings, see what you get from there and then look at the number of major and minor arcana in your spread, this will help you see how much 'wiggle room' or effect you can have on your future path.