I believe if you do a combination of merchandising and mystery shopping you will have a more consistent income, have more jobs in one area rather than having to drive around and have easier jobs in general. Merchandising jobs usually consist of doing a small project for a retailer, normally the same one over and over in their different locations. If you can find a merchandising company that pays by the project, you make an increasing profit on each location because you can do the job more quickly. There is a lot of information in the merchandising section on which companies are the best but I find a combination of merchandising and mystery shopping is a good way to stay busy.