Here's a hypothetical question for you: How much could Bruce Lee squat?
The answer: Who cares?
Point is: Guys like Bruce Lee didn't need to heft heavy iron all the time. Instead, they trained with only the weight of their own bodies. As a result of that bodyweight training, martial artists like Lee developed supernatural proprioception, incredible muscle endurance—and, yes, explosive strength.
With these three workouts, you'll be able to lay the same foundation for all-around, practical strength. Best of all, you don't really need much equipment, if you need equipment at all.
Here are three bodyweight workouts. Incorporate all three workouts into your regular fitness regimen and be sure to master each of them before moving on to heavy weights.