Drop shipping is an eCommerce model where you buy products from a supplier who then ships the items directly to your customer. This is ideal because it mitigates the age old problem of sinking $5,000 in your first batch of inventory that may end up collecting dust in your garage (while you eat the cost). Instead, you list your supplier’s inventory on your site and when an order rolls in they handle all of the shipping and logistics while you collect the profits.
It’s not very engaging, or mentally stimulating, but taking online surveys through companies like Survey Junkie do pay out (a little), believe it or not. Even if the payouts come in the form of Amazon gift cards, sites like Swagbucks can pay well. Just don't expect to make bank with this side business idea—I recommend combining it with another source of side income from this list of my best business ideas, and turning to surveys in your downtime when you need a little extra income.
As for other tips, all I can say is “a penny saved is a penny earned”. If you are running out of ideas to make money, start saving. Some quick “low hanging fruit” tips to save some quick cash include – switch to MetroPCS or Boost for cellphone (I only pay $20/month), switch auto insurance to Insurance Panda ($25/month), and start using GasBuddy (saves me like $100/month at least. I drive a lot).