Of course there are any number of tips to help with this! One common mistake which people don’t even realize is wrong is to have outlines in your drawings. But look around you! Notice how the objects next to you don’t have pencil outlines keeping their color inside–they just stop. Try doing that with your drawings. Let the shading of the object come to the edge and form the edge, without having a sharp line there. Lines are good for starting a drawing. But if you’re shading at all, use it to your advantage. Let go of your lines. It will take your drawing boundless steps forward.