It's critical to go out with experienced fishers and watch carefully. You can learn so much by watching their every move, especially their approach to mending. Eighty percent of the time you will need to mend the line aggressively upstream to make sure that the indicator leads the way, ahead of your line. If the line is mostly in really slow water, a downstream mend might better produce a truly dead drift. Imagine how the fly must be drifting as it sinks, and do everything possible to produce a truly dead drift.
Wait for it - it is truly amazing when that 24 inch bow pulls away line.