Magic Forums

I've been looking for a similar topic in older forum posts, but could find what I'm looking for so here I'm.
I know many people can get glipse of the future without the aid of mediums like tarot, what I'm asking here is there anything to enhance this abilities?
I know meditating and focusing are the basic (grounding as well) but what I'm looking for is a way to master this abilities, because sometimes it's confusing, in better words, I get confused between "visions and feelings" and my logic mind telling me it's just a wrong impression or my wishes, nothing more.
Could anyone point out a reading, as a starting point for further researches?
Thanks in advance, at least for the patience of reading. =)