Hahaha, I ascribe to this method as well
In all seriousness though, yeah, this. I started off learning guitar when I was young, which naturally led into getting decent at bass, and then after that comes a fairly decent working knowledge of the majority of stringed instruments...and then about 4 years ago I picked up drums out of necessity for a friend's band. Trying to learn piano at the moment, and it's by far the most difficult instrument I've ever tried to learn .
Pretty much the best advice is to just always be tinkering around with stuff!