Poles are great to work on distancing and collecting your horse ( eg. try getting 3 strides instead of 4- easier because its just poles and not fences) I've been enjoying lately working on roll-backs and jumping on an angle over fences. All these are great on making a horse sit on his bum and engage his hind end :) Hope these help!
Cavelletie bounses are good
- Cavaletti, raised cavaletti, (polework generally)
- Regular, consistent dressage training (poles included)
- 2-3 times a week lunging for 40-45 mins (you can add poles too)
- trotting is very good for endurance training, cantering rather regulates breath. Alternate, do days of no canter, only trotting, do days with some more cantering, but never forget about the dressage, do not canter stupidly around, without asking for stuff (at least circles, if not extending and collecting)