Bonding takes a lot of time. Bonding pouches help, doing licky treats, etc. Ive also found that Cammi loves it when I sit by her cage and just talk to her. She'll jump right on my hand when I put it in her cage after I've sat and talked to her for a while. And she makes this chirping noise at me when i pet her and talk to her.
Tent time is fun. Toys help, too. Patience is really the key though.
And I agree with Shadow as far as diets go.