To avoid a dropped chain you need :
- a well adjusted front mech
- some planning ahead on when you might need to move to the smaller chainring
- preferably be in a gear nearer the middle of the cassette, rather than going all the way to the big cog while in the big ring, which might involve a double change, smaller cog as well as going to the small ring
- to back off the power a little
- use a dog fang or similar if you can't stop dropping the chain
- a well adjusted front mech
- some planning ahead on when you might need to move to the smaller chainring
- preferably be in a gear nearer the middle of the cassette, rather than going all the way to the big cog while in the big ring, which might involve a double change, smaller cog as well as going to the small ring
- to back off the power a little
- use a dog fang or similar if you can't stop dropping the chain