Move entities from one sketch to another

I have something drawn on a sketch. I want to now break it up and put parts
of the sketch on different sketches.

What is the easiest way?

 

1. Cut and past into other sketches (but lose relations), contstrain
all, then autodim (not associative to first sketch).
2. Create new sketches and use "convert entities" and keep
associativity to first sketch, using it as the "base sketch".
3. Create "derived sketches" and use "contour selection" to drive
features, keeps associativity to first sketch.

Question, can you avoid breaking the sketch into parts by using contour
selection for selective feature creation?

~Alex

 

Thanks.
I should probably use contour selection.