Hello,
Timebuilder is right on the money with his comments. It's all about relative motion, and being able to visually percieve changes in aircraft attitude and how they affect aircraft performance. I teach my students to early on to rely very little on the instruments, yet still use the integrated instruction method of cross-checking the instruments occasionally for desired parameters.
One thing that also helps, is to use the aiming points (if at an airport with them) to guide the airplane consistently to the same spot on the runway. If you hold the aiming point in your field of view and it neither rises or falls. You will always arrive there. The trick of course is maintaing the correct speeds, configuring at the right time and coordinating pitch and power to hold that desired flight path. It is a very intuitive method and really forces the student to be looking outside in addition to cross-checking the instruments, watching for traffice, communicating, etc...
Regards,
ex-Navy Rotorhead