Take two existing ideas and combine them. Most innovations come from people who are able to make interesting connections that others might not see right away. Look at everything that interests you and see if any of your ideas could be combined to create something new. For instance, if two of your interests are Gourmet Cooking and Art History, you might think about marketing products that are intended to beautify the kitchen and dining areas. Put an old idea into a new context.
Innovation is often times just a matter of putting an old idea into a new package.
Get a new perspective. Collaboration is often the REAL mother of invention. Discuss your ideas with a friend or an associate, even if they are not directly associated with the business. Other people can offer other ways of seeing a problem or a situation. Remember that innovation is always based on good research.