I'm curios to know how other artists are able to draw so good and fast.

Being slow on drawing is something I've been noticing a lot over these past years. It's been bothering me since I started drawing back in 2013. How do you go on about drawing sketches, line art, color and shading?

For sketches
Do you draw tiny shadow figures first to get the pose the way you want? Do you use forms to sketch out the bodies before going into detail? Or perhaps you don't use shapes and rough sketches and when you start sketching the detail is all there?

For line art
Is there a setting you like to use or specific brushes? Do you precisely follow your sketch? Do you use the eraser often to correct what you've drawn? etc.

For coloring
Do you use the bucket tool to color your art or color everything in yourself like in a coloring book?

For shading and light
Do you insert a light source for easier understanding where the light comes from? Is the whole body in shadow and you use the eraser tool on where the light hits?

Since these are something I need to work on more, I'm looking for advice from fellow artists so I can try out different techniques and get better and faster at it.

Thanks to anyone willing to help and give advice. Also thanks to anyone who read through it all, regardless if you can help or not. I appreciate you all. :D