My sister uses her computer for her home business. She's a photographer and freelance journalist. This could be a good option for some of you. Sis took college courses and got a degree in journalism, which included photography. She learned about taking good pictures, various photography techniques, darkroom, and history.
Doing this work has meant she needed to bump up her dell memory to accommodate all the photographs she loads to her computer for editing. She takes her photography equipment just about everywhere with her, ready for the odd photo op that may present itself.
She also interviews people in the counties around her for articles of interest in the newspaper. She's learned a lot of the history of her area doing this and earned money in the process.
One other thing she does is teach in the public schools under a special program in our state, known as Artists in Education. These are classes that last about two hours a day for a week and may be anywhere in the state. She is compensated for her time, her materials, and given an allowance for staying over in the area for those days.
You may have an interesting field of work that you could use in this manner and earn some extra money through it.
