First of all come up with a good name not like I was bored or i dont know

second make something thats popular like The Amazing Spider-Man or Batman and title them off the latest most fitting thing like make a skin from The Dark Knight then make it acually for The Dark Knight rises

try to use shading theres plenty of tutorials right here on planet minecraft or on youtube so dont worry my pick on the best shaders are Leostereo and the_ soup so go look them up on Members

Be original recently I made two skins that are Chicken-Boy and Ocelot-Man which were random but I like them

DON'T STEAl you do and it looks really good and you took lots of time on it it WILL be taken down

make something that you think is good it doesnt have to be something you don't like

make something for the contest it helps people have more popular skins so try it out

Last but not least don't make scribbles or dumb ones try to put a little time into it thanks for all the support