A quirky but interesting online business idea would be to create forms and templates for other businesses to use. When new businesses are starting out or current businesses decide to expand their efforts they often are in need of forms to help streamline their business. If you have experience in the corporate world you will understand the amount of forms that are used on a daily basis.
The best way to get started in this industry is to build a bunch of forms and then place them on a website that you created. You can contact local businesses and tell them about your forms or services to see if they need any custom forms. The best way to build up business online is to find an untapped niche and then dominate that area as the best supplier.