Regular chocks on the opposite side from the side that is lifted.
OR Anderson levelers for lifting act as a chock in combination with regular chocks on the opposite side. I use those. If you go with the Anderson, one of them may need to be shortened to fit between the wheels.
https://www.amazon.com/Andersen-Hitches-3604-Camper-Leveler/dp/B001GC2LVM
X style that go between the dual trailer wheels if your TT is so equipped is another option.
https://www.amazon.com/X-Chock-Wheel-Stabilizer-Handle-28012/dp/B002XLHUQG/ref=sr_1_1?s=automotive&ie=UTF8&qid=1491517583&sr=1-1&keywords=x+chock+wheel+stabilizer
Congrats on your new TT!