Is an Aileron Roll Easier Done Opposite The Rotation Of The Plane's Propeller?
Yes: Rolling one direction easier than the other, as you mentioned, newton's laws are at work here.

Special Tricks? Also Yes.  There are several design strategies to deal with asymmetries of thrust from propellers.  Bear in mind that these thrust asymmetries are not always at work, so any design feature is a trade off.  The propeller must be running, angle of attack is a factor, etc.  I have heard of asymmetrical wing incidence used, but more often a slight offset of a tail-plane, such as the vertical stabilizer is used.