If you look around the internet and do your research on the companies there are some online work at home jobs that will pay you $300.00 per day and more.
You could also if you're lucky make $300.00 per day and more with Adsense and a blog if you have enough content and can dedicate time to the blog and push out stellar content and get enough website traffic.
You also need to be writing on a really high paying Adsense topic to reach $300.00 per day or more.
Some of the big websites online earn even more than $300.00 per day and some earn as high as $10,000.00 per day if they're large enough websites with a large enough website audience.