I agree with the practice, play along with songs, etc, but here's another suggestion: Find some other musicians to play with, preferably those with a similar skillset as yours. It'd be ideal if there was another guitar player, one who knew a bit more and was willing to show you the ropes a little. You could start out playing rhythm, and learn as you go.
I dabble in guitar, but have played bass for 20 years in many different types of bands. It's amazing what playing with others will do for your playing ability, timing, appreciation for other styles of music, etc.
Plus, it's fun, and a good excuse to have a beer with friends.
Jim