A good exercise would be to find hands you aren't involved hand that gets to the river.

Step 1) Play through the hand very quickly without getting to showdown and write down a range for villains that you believe they can have.

Step2)Open up 2 pokerstoves(one for each villain). For EVERY action that takes place eliminate hands from villains ranges.

This will allow you to see how taking time on every decision and being careful to accurately think of what villain has will show more accurate results for you then quickly deciding villain has XX or even not hand reading at all and getting to the river quite clueless. Of course for this you will need HEM or PT so get those programs and get a HUD!