Apply, Apply Apply. The best way to get more jobs is to register with more companies and apply for or accept more jobs.
You might also consider "expanding" your shop area, look for and accept jobs in cities in the wider area trying to schedule farther shops together (or "bundle) so as to cut down on gas expense for each individual job while increasing the amount of money that you earn.
They have a list (free) of companies that are all free to register with on this forum or at volition.com, walletboosters.com, mommybiz.com and several other places on the web. Also, MSFreedom (msfreedom.org) has a free list of companies that are "graded" A-F based on other shopper's collective experience with them to help you decide whether or not to register with a particular company.
Register with as many companies as you have to until you are as busy as you want to be. And NEVER PAY to shop with ANYBODY! THEY should always be paying YOU to shop!