Well I started it a few months back and to be honest the readings were crap ! the cards I got were some cheap ones from a bookstore here called Waterstones. I then went out and picked my cards and did a few more readings, I gues I kinda got used to them and so far I have done about 7 more readings and they have honestly been so accurate and I know this for a fact.
I believe that everyone has a phsycic ability after all we only use a small ammount of our brains as we know, so you just need to learn and become open to it. I dont believe that the tarot is connection with spirits etc but believe that it is a personal awareness, there is a reason why that person picks the cards they did etc you have something inside you.
As ex witnesses we all need to learn to be a lot more open to this sort of stuff if it is of interest to us. Personally I find it very interesting, often it is the case that I will say things before my partner says it or my partner will freak me out seriously by telling me things about my day at work or something that wouldnt be known i.e what people were wearing in the office etc. Stupid things I know but its kinda cool.
I wouldnt go down the route of ouija or anything but certainly believe that we have guardian angels, guardian animals, spirit guides and stuff like that. I also believe a lot more of healing things with herbal stuff and naturally, really trying to go back to the celts and stuff.
If I can be of any more help even just to compare notes drop me a line.
Matt