Hairagain;
the KEY to a good blend is #1, the color has to match. another mistake I see people make is that some will look great when they first get thier piece cut-in...but then their own hair grows out so that it is longer than the hair piece hair, this will give the appearance of a hairpiece just sitting on top of ones head. your own hair MUST be shorter than the piece hair to achieve a good blend.
one other thing, is to properly use the blending shears. to do this, just cut at the very ends of the hair piece hair where it meets your own hair.......I demonstrate this at conventions because it is crucial to getting the hair to LAY INTO your hair...and not sit on top of it.
I hope this helps.
DebbieS.