Getting better as drawing and art is something we all strive to do and I am constantly wanting to improve my own skills as I see so much wrong in my work. It is a healthy sign when an artist has a desire to constantly improve and I guess in truth, a real artist feels that they never achieve their final goal but the journey is where the magic and fun happens. Sure along the way there will be some frustrations and even one or two mountains that seem impossible to climb, but, it is all a part of growing as an artist and improving in the ability to draw.
One of the easiest and best ways is to sketch as much as you can, everyday if possible and then some!
Constant drawing and sketching will go towards helping you get better. Read books on art, watch television programmes on art, there are so many more now available to view, visit galleries and if possible join an association or an online community where you can 'hang out' with others and soak up the energy.
Above is a quick sketch I did in Photoshop with my Wacom Intous and I'm not completely happy with it but the idea is there and it was fun putting together!
It is sketches like this that help you move along and develop more as an artist.
As I said, I have a long way to go myself but I am really enjoying the journey and would not swap it for the world!