Looks like you got a ukelele chart there.
Anyways, on acoustic guitar, I like to use different tunings as well as one or more capos at the same time. For those who don't know, besides the standard capo which spans the whole neck, there are also capos that leave the low E string open and there is a capo that only frets 3 strings. Using these capos in combination with alternate tunings opens up a lot of room for creativity. David Wilcox comes to mind as someone who is well versed at doing this.
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I have found that working on my acoustic guitar playing has also benefited my electric guitar playing. I play guitar, bass and keyboards, and a little mandolin, bouzouki, zither and percussion. I have a number of instruments, but my favorites are my 1974 Stratocaster and 1965 Hofner 500/1 "Beatle Bass".