The answers to the following clues will have something in common.

1. Where you'll find the thing you lost, usually
2. Good advice when crossing a street
3. Politically opposite positions
4. Certain dominance - from birth
5. Diamond parts
6. Logical vs. creative body parts - informally

Answers:

1. Right where you left it.
2. Look to the left and right.
3. Liberal left and conservative right
4. Right and left handedness
5. Right and left field
6. Left brain - right brain