Tip 2 for any artist,
Take breaks. Or you might hurt your eyes. Not like shown above, but enough to damage your eyesight. During your breaks, you can go to the bathroom, take a nap, or eat. Thus replenishing your life bar. Also known as making yourself feel better and stopping  yourself from not getting hungry or tired. Or pee yourself. 
That would suck.And you would get a sucky drawing as well.

Tip 2 for any artist,

Take breaks. Or you might hurt your eyes. Not like shown above, but enough to damage your eyesight. During your breaks, you can go to the bathroom, take a nap, or eat. Thus replenishing your life bar. Also known as making yourself feel better and stopping  yourself from not getting hungry or tired. Or pee yourself. 

That would suck.And you would get a sucky drawing as well.