I think listening to music might be an effective tool for metaprogramming.

I am almost always listening to music. Psychedelic rock, indie music, electronic, experimental, world/spiritual music, reggae, etc. As my musical tastes get more and more diverse, I feel as if I can relate with and sympathize with others better. I know it might seem as if it was from simply having more in common, but it feels beyond that, as if we traveled the same path or something. The process is gradual, but it definitely helps develop the following circuits:

2: Emotional: I've experiences many emotions I usually do not experience, or cannot even describe, from music of different sorts. Having a wide array of emotional experiences means I can generally control them better.

3: Symbolic: I've only gotten into guitar recently, but mathematical intelligence and musical intelligence often go hand-in-hand. Plus there was a study that correlated higher test grades with listening to classical music when studying as opposed to not. Listening to music makes us more aware of space-time patterns.

5: Somatic: everyone who has listened to music stoned should relate to this. Even if not, listening to a favorite album at the right moment leads to a great high.

7: Neurogenetic: world music and awareness of music history is comparable to the awareness of hominid evolution.

Since LSD and music, I've been able to induce a visualizer-esque effects when I close my eyes and listen to certain music. The light that enters in the darkness forms colors and patterns that move to the music, sometimes if I know the lyrics/meaning of the song it might influence the visualization. For example, an autumnal song about trees might feature a spinning tree with leaves changing color and form, with other colors encircling the tree.