I’ve been providing a simple ‘green’ service at commercial properties since 1981. Using only hand tools, I perform a daily litter cleanup service for the exterior property (sidewalks, parking lot, landscape). Almost as easy as going for a walk! I generate a six figure income yearly from this simple, home based, low cost start up business and I can teach you how to do the same. Details online: http://www.cleanlots.com. Affiliate program available.
Don't sacrifice morals for a quick buck — At the outset, you'll want to do all sorts of things to make money online, but don't sacrifice your morals for a quick buck. Not only will you put people off, but you'll lose Google's trust. You also shouldn't concern yourself with things like Adsense or other ads on a blog before you have around 100,000 visitors per day. Yes, per day.
Because digital marketing has so many options and strategies associated with it, you can get creative and experiment with a variety of marketing tactics on a budget. With digital marketing, you can also use tools like analytics dashboards to monitor the success and ROI of your campaigns more than you could with a traditional promotional content -- such as a billboard or print ad.