Carry a notepad and writing utensil with you throughout your daily routine for a week. Ideas for your character can come to you when you least expect it. It's always a great idea to be ready. Write down any idea you find sufficient for your character into the notepad. Ideas may include names, places, hairstyles or scenarios.
Find a comfortable, relaxing and quiet place to gather your thoughts and brainstorm ideas for your character. For example, a comfortable place may be a coffee shop, your living room or a park. Get situated and lay out a few sheets of paper, writing utensils and a snack.
Copy each idea you recorded into your notepad onto a blank sheet of paper. Draw a line connecting each idea regarding an individual and place that are similar. For example, a clown may be related to a circus or a circus-themed store. Then connect any similar scenarios to the character. For example, a clown at a circus themed department store, that can't seem to be funny.
Create a character profile. Give your character a name, background and personality. The name is one of the most important aspects of your character. Come up with a name that is unique, clever and directly relates to their personality. For example, a character with a name such as "Chuck Steele" would probably be a smooth talking action hero. A clever name will stick in your reader's mind. In addition to a great name, readers want to know why your superhero takes the actions he/she does. Create a back story that tells of how your character became "super".
Give your character superhero attributes. Every superhero has something that makes them "super" and stand out from their "ordinary" counterparts.
Create a villain. Every superhero has a villain that is memorable and relevant. This character must challenge your superhero and push him/her to their limits. Give the villain a goal that is in direct contrast to what your character is trying to accomplish. For example, if your superhero is a protector of the ocean, then your villain will probably be someone who disregards the ocean and pollutes it.