For cardiorespiratory exercise, I like relatively short brick workouts (combining 2 of the three triathlon events: swimming, biking, and running; never longer than 30 minutes for any 1 of the 3 modes or 45 minutes total). Alternatively I like hiking and snowshoeing if you lump that into “training.”
For weight training, I like Super Sets, Pyramiding, Compound (multi-joint) exercises, and Alternating Rep (i.e. Squat / Press) Movements. My ideal workout would include throwing any or all of that into a strength circuit (not necessarily an aerobic circuit with no rest).
For implements my favorites are sandbags, battle ropes, dumbbells, kettlebells and suspension trainers. If I had to pick one it would be sandbags, or dumbbells, or well, I can’t decide…