When I say I compile information I mean I have a scratchpad in which I fill in the evidence that is relevant to my current needs. So I'll have the source noted there.
What I'm trying to say is that I rarely go back to the scratchpad of a previous question / problem, but I will approach every question and problem with a new search.
Trying to save information for the sake of it without knowing what future use it is going to have stresses me out, so I find that this fresh scratchpad approach works best for me.