Buying a horse would be number one, then dab my feet into English riding, potentially try reining ( if I can find a barn), and just ride, ride, ride. And get a move on about buying my spruce meadows mid summer masters tickets :).
My summer list would be 1. To get my foal halter broke and start ground work with him; 2. Start ground work with my yearling and get her to trust people again (she seems really skittish and unsure of new people); 3. Get weight on my rescue mares; and 4. Send my QH to reining training before fall!