Affiliate Marketing Secrets

There are several things I want to do from my home office, and wondered if I apply for a business entity….LLC, I am assuming, can I put several businesses under one name? Under one entity? I want to start a couple infopreneur websites, with affiliate marking involved, also being an Ebay seller, and have a home business with a Health and Wellness Company, and training to be a blog consultant, and a Family Manager Coach. Most all done online in some capacity or another. Any help or advice would be much appreciated and also wondered if it is wise just to have my name be the business name because it has different businesses involved.