I really like the "Iterative Drawing" convention mixed with "Quantity, not Quality". First and foremost, I recommend watching this https://www.youtube.com/watch?v=k0ufz75UvHs and then reading this http://johnmuirlaws.com/art-and-drawing/quantity-quality (I think everyone will like these links :)).
Instead of stressing out trying to make ONE perfect subject (quality), you will instead draw hundreds of imperfect versions of the subject, but always learning something new (iterative quantity). After that, you will be able to draw UNLIMITED perfect variations of the subject. <- make sure you always review every drawing and correct your mistakes in the next one/add something new in the next one, otherwise it won't be "iterative", it will be "blind" practice.
Every drawing is a preparation for the next one, so don't focus on pretty pictures on daily practice.
IN DETAILS:
It is no use if you keep blindly drawing something for the sake of "practice everyday" without correcting your mistakes, without learning about them and without improving upon them. So the iterative drawing + "quantity not quality" makes you draw the same subject dozens upon hundreds of times. But applying what you learned in the previous drawing and fixing it. Then since you are focused on quantity, you will draw, for example, a billion eyes iteratively, with just a little fix here and there, until you master it.
“The ceramics teacher announced that he was dividing the class into two groups. All those on the left side of the studio would be graded solely on the quantity of work they produced, all those on the right solely on its quality. His procedure was simple: on the final day of class he would weigh the work of the “quantity” group: fifty pound of pots rated an “A”, forty pounds a “B”, and so on. Those being graded on “quality”, however, needed to produce only one pot – albeit a perfect one – to get an “A”. At grading time, a curious fact emerged: the works of highest quality were all produced by the group being graded for quantity. It seems that while the “quantity” group was busily churning out piles of work – and learning from their mistakes – the “quality” group had sat theorizing about perfection, and in the end had little more to show for their efforts than grandiose theories and a pile of dead clay.” and Drawing isn't about trying and trying until something nice turns out. If your drawings look bad, there's a reason for it. You need to find it and solve the problem, not go and create a situation in which this problem will not be visible. You won't become a chess champion by facing only players that are easy to beat.
EDITED - these are my notes and annotations that I extracted from the video:
- Creating bridges between the analytical and intuitive sides of the brain.
- The intuitive brain is not struck in this world where everything has to be explained and measured, like the analytical one.
- Do not get struck in one way of doing things (creative freedom)
- Example: Instead of creating a whole body, create 20 heads, changing positions, etc ITERATIVELY, checking defects and correcting them next. With this you will get a lot of mileage and muscle memory.
- Wait a day, analyze, see what’s right and wrong, and do again.
- Iterative: not about making a finished image, it is about developing the brain, from purely analytical to intuitive mileage
- Analyze and make better guesses of the first item you draw in the series, then keep iterating it
- Also focus on iterating a single item many times instead of doing for instance: a person, a tree, a skull, choose one, let’s say a very specific tree and keep iterating it by your own, analyzing it, until mastered.
- Another example: don’t draw 20 different eyes in a page, instead, repeat the first eyes 20 times, BUT analyzing and improving one by one until perfected or until you feel it is right
- Pages and pages of iterations
- If using references (https://youtu.be/k0ufz75UvHs?t=35m5s), don’t copy. Study and analyze based on your drawing, what is different / let’s try again / what I remember etc. Also try this day and then wait until next day and try again from memory, or comparing to previous day.
- Draw pages and pages, BUT ANALYZE WHAT YOU ARE DOING, WHY AND HOW CAN I IMPROVE IT and then draw again improving. And keep improving and analyzing. Instead on relying on tutorials and everything else that tell you what to do. Figure it out yourself.