When I pick up the guitar, I always try to find something new on it every time. This has been true since the very early days of wanting to play, and since I was always self-taught, I felt it was critical to pick up something new on the instrument each time I played it. This is also just due to my naturally creative nature, and the fact that any instrument to me becomes something 
to instantly “create” with, not just to learn how to play. The creativity is the learning process, and vice versa. I can recall traveling home from school on the bus, and just “dreaming’ up licks that I was imagining on the guitar. I couldn’t wait to get home, and to try them out and see if they worked as well as I was hoping they would!
This is also a critical part of the writing process, as many of our best new song ideas simply come from “thin air” as we pick up and start playing our instruments. Be aware of this process, as you certainly never want to miss out on any wonderful ideas that may suddenly come to you, as the result of playing spontaneously. I also find that these days, since I teach so much, many of my most creative ideas may come about during the lesson itself, as I may have to dig deeper and deeper to satisfy a very accomplished and advanced student. The birth of a great guitar lick is very often the birth of a great song. Never forget how many great tunes are based around truly “hooky” guitar riffs that no doubt, occurred during the initial moments of creating the song in the first place!
So, please keep this in mind as you move forward in your development. Learn something new every day, and be especially on the lookout for anything that really stirs the creative juices for you, and that acts as a true “spark” that may lead to better playing, or a new tune. You never know where these things come from, but they sure get a “head start” when that wonderful thing known as a guitar is in your hands!