One key thing is to study anatomy and proportions. Get a good understanding of how the human body works and looks to avoid odd shapes.
Avoid using too many clashing colors. A good color palette that complements each other helps. And always practice basic drawing techniques regularly to improve your skills.
Avoid using cliche phrases and tropes. Try to be original in your descriptions and dialogues. And don't rush the ending. Make it satisfying and logical.
Avoid info-dumping. Don't just throw a bunch of background info at the reader all at once. It can be overwhelming and boring.
Not having a unique concept is a surefire way to fail. Your comic has to stand out from the crowd. Another thing is not planning the panels and page layout properly. It can make the comic confusing and hard to follow.
Don't make the plot too confusing or hard to follow. Keep it simple and engaging.
First, plan your story well before you start writing. Then, avoid cliches and stereotypes. And always keep your audience in mind.
To not write a bad novel, focus on having a clear beginning, middle, and end. Make sure your story has a purpose and that the events flow logically. And don't rush the development of characters and their relationships.
Avoid poor character development. Your characters need to be interesting and have clear motivations. Also, don't skimp on the art quality. Comics need to look good to draw readers in.
One common mistake is getting the proportions of body parts wrong. Like making the arms or legs too long or too short.
You should avoid poor pacing. Sometimes writers go too fast or too slow. Strike a balance to keep the readers engaged. Also, be careful with grammar and spelling errors as they can really pull the reader out of the story.
First off, don't rush into the story without a clear plan. Know your characters and the main plot points before you start writing.