I bought a ELK log periodic dual band antenna. VHF/UHF 5 elements.

What are some good DFing techniques?

How much distance should be between my body and the antenna?

This ELK antenna is fed near the reflector. Whats up with that?

It says it has 20 db of front to back but I sure can't see too much
difference while pointing and not pointing at repeaters.

Where is a good place to get attenutors.

Should I have bought a different antenna for DFing?