Initially, you'll work to refine the instrument skills you had to demonstrate for your private certificate. You'll soon learn which instruments are giving you the information you need during various maneuvers. Don't ignore the value of a desktop simulator or procedures trainer for developing your scan. You'll also learn that there are specific power and pitch (attitude) combinations that always result in the same performance. There will be combinations you'll use for holding patterns, for descent with the gear and flaps extended, and for climbs. In instrument conditions, trim is your friend. Use it. If the airplane is equipped with an autopilot you'll be expected to know how it works and the ways to eliminate it when it's not helping. Be sure your instructor is willing to let you use it. For single-pilot IFR operations in serious instrument conditions, a functioning autopilot is almost a go/no-go item. Once you're comfortable controlling the airplane with reference to the instruments, you'll begin flying approaches. Flying approaches is simply a matter of tightening the tolerances for the four basic maneuvers you've been practicing: straight and level, turns, descents and climbs (for missed approaches). As you fly approaches your navigation skills will improve because of the reduced margins for error allowed during approaches. The instrument ground training should have taught you how to "brief" an approach and how to mine the critical information from the chart that you'll need to fly the approach safely.