Boxing Day run is always a tough one after the amount of food you eat on Christmas Day. Enjoyable regardless, though.
Set myself a new program when running along the splash (1M): jog to the first bench, then sprint to the second, followed by ten push-ups on said bench. Do that the whole way along. Must be, easily, about 30/35 benches across the mile so it's not easy. Absolute monster of a task, but you feel fantastic by the end.