If you are really short on cash and need some immediate funds then you should start by looking around your house. Clear out your cupboards and find any items lying around that you don’t need or haven’t used for a while. Then sell them on eBay. Just because they are gathering dust in your cupboards, doesn’t mean someone else won’t snap them up. Simply sign up with eBay, list your products and then, as they are sold, send them off to the buyers.
If you have an eye for design and some experience of creating websites, then you could offer your services as a freelance web designer. You will need to create your own stylish website, and have a few other projects that you can show potential clients to demonstrate your skills. You will also need to initially spend time emailing businesses to promote your services and find work.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.