you have covered good stuff in your port.... RSS feed ads is an amazing idea for me.
Don't forget to offer services like: content writing, proof-reading, graphic design etc
An online job is the most common and easiest work to make money these days.
I feel people cannot make enough money from adsense these days.
Marketing is strategic. To succeed, you need highly focused goals. You need a framework for a scalable, replicable framework. It doesn’t matter whether you’re a beginner or an advanced marketer — this fact will always hold true. If you run without direction, you’ll end up wasting two of your company’s most valuable assets: time and money.