I really like reading and watching Denny Brauer, he has taught me a ton on jig fishing.
I can't really add to what has already been said, but in due time with fishing t-rigs, jigs and even c-rigs, you'll get to understand what your bait is doing underwater and what it feels like to hit a rock, stump, clump of grass etc.
For me, I need to watch my line constantly and concentrate to the point where I can almost visualize what my lure is doing during the presentation. As soon as my concentration is brokened or I don't have the concentration needed, then the presentation won't any good and opportunity of a caught fish is gone.