Just a quick note on setting goals for yourself.
The best way to set your goals would be to think about where you want to be in a years time, then work your way backwards and calculate what it is that you'll have to do by the end of lets say 2 months.
As long as you keep hitting your goals, you'll get where you want to be. It is ok to take a rest now and again. If your goal is too high and unrealistic you can always lower them. But remember you are trying to push yourself to the limit to maintain progress.
I want to be at Alex Negrea's standard in a years time.
Well, he has done thousands of sketches to get where he is right now. So I would say 6000 sketches in a year will help you towards your goal in a years time.
So that makes it only 500 sketches a month or 125 sketches a week. Doable right?
If you find the target too easy to beat, aim for 12000 pa. Remember, you only get out what you put in.
Remember to always eat healthy and stay fresh.
Design through expression