How do I prevent my rose hair tarantula from becoming aggressive?

I got her about 3 days ago. This is my first tarantula I've ever owned. As far as I know, she is just a basic rose hair. I don't know anything about subspecies yet. So far, she is really sweet. She never shows any signs of aggression and I'd like to keep it that way. I've heard some people say that holding them a lot can stress them out and make them bite (I hold her about once or twice a day), and I've also heard that there are some foods that can do the same thing. She is in a ten gallon aquarium and I'm using a soil substrate and feeding her crickets. She has a place to hide, my room is at about 75 degrees, and I mist her enclosure every other day. Are there any things I should do or should avoid doing to keep her docile?