The funny thing is that in most situations, focusing on very few, but crucially important facts, while blocking out all the rest, is enough to do so.

For example when deciding whether to move to apartment A or apartment B, knowing location, price and having a few pictures is usually all you need. Once you over-analyze every detail, such as where the plugs are more conveniently placed, it becomes impossible to make a good call, because the little puzzle pieces of information start to hide the much more important ones.