Watch the Locking Up online guitar lesson by Robben Ford from Rhythm Revolution: Vamps & Jams
Rhythm guitar is a great pleasure, or more so a great joy. Generally, guitar players want to be hot stuff and play a lot of fast licks, and will concentrate on that. Maybe they'll learn some chords, but they can't wait to take a solo.
There's just as much pleasure to be had playing rhythm guitar, and quite frankly you play more of it than soloing. Over the years, I sort of developed a style of playing based on really connecting with rhythm.
Something my friend the great bass player Abraham Laboriel said to me when I was still evolving this style, which his teacher told him, was to "play like a drum." So, we're trying to connect more with the rhythm than the lead guitar in that sense. In this way, you're one with the drummer.
Finally, when putting these things together, it's important to use logic. There needs to be some concrete idea tying it all together. When you look ahead and do things with a purpose, it gives the whole idea more power.