Watch the Funky Child: Rhythm online guitar lesson by Jeff McErlain from Blues-Rock Evolution
If I'm going for a Hendrix rhythm thing and it's not connecting, I try creative visualization, imagining what Hendrix looked like when he was playing. What was his body language, posture, how cool did he look? (Well, he always looked cool.) I find this really helps me draw upon certain players when I need to.
I may not be trying to sound like them and I certainly would look silly trying to look like Jimi, but it's a way to channel their energy.