There's a WIP forum on PJ where you can post questions like "How do I draw grass" and get help before submitting something to the gallery. You'll probably get more help that way, so people know you're serious about improving your work.
Want to give some dough back to all those amazing pixel artists? Donations provide prize money for contests, help cover hosting costs and support new initiatives.
Thank you for the tip! :D I'll check it out!