Hehe... I just play too many musical instruments.
Although playing the variety I do kinda contributes to helping me to play all the other instruments I play. Keyboard has helped me read chords and know what notes are in what chord as well as the notes in the scale, basic Piano skills have helped me learn how to read averagely in the Bass Cleff, and Theory of Music has helped me learn all the rest of the things to do with music along with the ability to read in the Tenor Clef and the Alto Clef.
Although... I've discovered that playing the Flute is deteriorating my Clarinet fingering after nearly 4 years of playing both. I found out I've been using the Flute fingering for F Sharp in the upper register on the Clarinet for a while and I've never noticed because it sounds nearly the same but if you had perfect pitch it sounds pretty bad.
But playing the Violin has helped. I've finally learned to virbrato after several years (yeah I know I'm lazy...) and playing the Guitar helps practice virbrato as well.
And of course Drums helps me keep the beat in music.
However I might just scrap most of my musical instruments next year... it's just gotten boring. And everyone thinks music is my career but like it's only a hobby.