jillkite
I use Tarot as a tool for introspection, both for myself and my querents, and to this end, I integrate as much background knowledge as I can to make sure my reading fits appropriately to the situation at hand. Contextual knowledge is, for me, what makes readings accurate.
Yes to this above.
Also agree with those who said that the future is always changing according to whatever is happening in the present, so future-based readings can very changeable, meaning that you can check something today, but maybe tomorrow it's something different because the energy has changed.
Like others, I never believe that my cards are 'wrong' but my interpretation, especially for myself, can be missing some peices that only become apparent later. i like to take photos of readings that i do for myself so i can refer back to them over a few days as new inspirations and perspectives about what the cards might be telling me come on the surface.