Since the concept of "exegesis" has come up in another thread as well, it has caused me to think more about it, and to bring to light some ideas that have been previously more instinctive.
1) To be proper exegesis, one has to be wary of projecting your own beliefs into the text. It is absolutely wrong to come to a verse and think to yourself, "How can I fit this verse into my beliefs?", as that is the textbook definition of "eisegesis".
2) To make sure that you're interpreting Scripture based on what the text says, and not according to your theology, it's important to put your beliefs "aside", and engage in some intentional "cognitive dissonnance". Put your beliefs in one compartment, and Scripture in another compartment, and begin studying Scripture in isolation, at the start. This is arguably a difficult thing for most to do, as they want everything to conform to their beliefs. But it gets easier over time.
The source of much of your error
Such as your a priori assumption world never refers to more that the elect of every nation