I have recently rediscovered a creativity action technique that I had forgotten. An easy way to increase your sketching time is to keep tools at hand all the time. Besides carrying a sketchbook and drawing implements with you when you travel outside of the home, leave a sketchbook (or sometimes in my case a stack of 24# bond letter size paper clipped on a clip board) and a pen/pencil in every room in your house. It will encourage you to draw something and give no excuses to not to. Any free moment you have, sketch your dog or cat, sketch furniture, cubes, spheres (all the foundation shapes) or just pull something out of your imagination. In my opinion practice is practice and can only get that hand eye tuned sharper. I, for one needs all the tuning I can get (LOL)!