1. Draw things you have a deep emotional connection to and make you want to draw.
2. Emotional accuracy is more important than emulating reality. Realism is overrated and reality is an illusion anyway. Just make a good drawing.
3. Balance light and shadow.
4. Don't create walls. You'll only run into them later. Avoid Puritanism of materials, tools, techniques, methods, and approaches. Don't be a perfectionist.
5. When you feel like you hate how a drawing is turning out, that's when it's the most important to keep going. Don't be too harsh a judge, but don't believe the drawing is any good either (you can never plan to create a masterpiece). You want to be right in the middle, in the zone.
6. You can only progress if you finish things. Reflecting on finished work, seeing what was successful and what didn't work, you can learn what to keep or change moving forward.
7. Style comes from what you do unconsciously. Embrace your deficiencies instead of hiding them. The struggle to draw something is more interesting than casual success in facility.
8. Strive for the best you can do, accept what the drawing is when you fall short. At a certain point the drawing becomes its own thing beyond your control. Let it be what it will be.
9. You gotta know the rules before you can break the rules.
10. There are no rules.
You can view Benjamin Marra's work at: http://www.benjaminmarra.com/