Having spent some time with an Intuos 5 I've understood why my digital painting skills were so slow to develop.
Sometimes it isn't just me, but the tool. In this case I've realised a good drawing tablet is necessary if my pencil skills are to translate to digital.
I am mostly a line drawer, but I seek to improve upon that with colour, digitally.
I've ordered a Wacom Bamboo Medium, as that is as far as I can stretch for now, but it will be adequate. :)
I draw a lot. I am good at it.
I will model more stuff in 3D and colour more. That I can improve while keeping up my drawing skills.
Soon to come: Mecha, vehicles and maybe some rendered backgrounds.
Unless the hardware fails me. I might need more RAM.
As long as things look as bright as they do now:
Check DA, Facebook and Flickr less.
Make more stuff.
Pick up the pencil again, don't just draw with pens and markers.
Keep drawing for 30 minutes to an hour or more every day.