Amazon Mechanical Turk, or Mturk, lets you get paid for completing small tasks. Some are surveys, some are small tasks. They don't pay much, but can add up, particularly if you can complete several a day. You'll have to start out slowly, usually with tasks that only pay a few cents until you've worked your way up, many of the more lucrative tasks require you to complete 50 or more tasks to qualify. You can sign up here.