Join Date: Feb 2013
Location: Perth, Western Australia
Even when I jump, I am working on my dressage.
I want my horse engaging his hindquarters, I want to be able to move him off my leg, I want him to go into the contact and having impulsion. It doesn't matter if I am doing flatwork or jumping.
There are heaps of schooling exercises you can do. Serpentine's, Spiral in, Spiral out, school figures, figure 8, transitions, trot poles, leg yield, Flexing, counter flexing, increasing and decreasing the speed of your W, T, C. Practice accuracy for your dressage tests (Change of rein, square halts, straightness, roundness of circles, etc) they are easy marks in a test to get and easy to throw away.
There are a few good book with exercises in them... 101 dressage exercises for horse and rider is a good one - you can even get it as an app on your iphone (if you have one, not sure about android). There is also 101 Schooling Exercises for Horse and Rider too. I use them whenever I am stuck for ideas when schooling my horses. :)
All of this will not only help your jumping, but is can also improve it. My riding coach is an eventer... he is also on the Australian National "A" Dressage Team. He has a team of horses prelim - 2* eventers (his 3* horse has retired) and a team of Medium - Grand Prix dressage horses. The eventers jump maybe once every 1-2 weeks. The rest of the time they do flat work, gallop work and trot poles. He is a big believer in cross training. The dressage horses get to jump and they also go out on trail rides. It keeps them fresh and allows them to experience different terrain. I use a similar training schedule for my eventer and dressage horse.