There are three aspects of music. These are harmony, melody and rhythm. Harmony covers things such as chords and when more than two notes are being played at the same time. Melody covers riffs, lead ideas, and anything that you can hum. Rhythm is pretty self-explanatory.
Batería by Antonio, licensed under (CC BY-SA 2.0)
One of the most fun things a guitarist can do is to stick on a drum beat, turn it up loud and jam the hell out of it.
This goes for acoustic or electric players and rockers or fingerpicking folk guitarists. It doesn’t matter what your style is, you need to be doing this on a regular basis.