In general this is a great drawing channel and i would recommend looking through the videos to see how the artist Sycra tackles certain subjects.
In this video though he got me thinking about how i actually practice drawing. I used to just hop from one thing to another, a drawing here, painting there and i would always work from a reference to the point that now i am very limited to what i can draw accurately without one.
In this video Sycra discusses speed and how you build up a sort of muscle memory for drawing certain things - coincidentally i draw eyes on stuff all the time and i've done it so much that i don't need to think about it... but i have difficulty with a number of other things. Ears for example.
There's no way around it. If you want to get good you have to put in the practice and draw the SAME THINGS over and over again until you don't even need to think about it.
Par example -