If you have not yet read part one of the series, I suggest you take a look at what you need to invest in the system before you begin. Some of you are wondering what kind of research needs to be done in order to succeed in the online advertising world. On the same hand, many of you are completely aware of the ins and outs of the business and what to do and not to do. As the title states, in order to succeed in most things you need to put forth some sort of effort. In this case, you need to research.
What Do I Research?
There are many different things that you can research, but to begin I have a few recommendations. First of all, when advertising it is nice to know where your keywords rank within your niche.

Seen above, you will notice that in order to have a maximum click through rate, you would need to spend just over $7.00 per click for the keyword “make money”. We all know that the make money online industry is very competitive and therefore the keyword prices will run you very high, but if you are able to find keywords that are related to your niche but not very expensive, you will thrive in the online advertising industry.
Along with the basic research to understand how your unique campaigns will work for you, you can research other campaigns and other keyword slots. You can run tests on keywords and see where your advertisements rank given the amount of keywords and bid price you have set.
Also, I would recommend that you shop around at the various ad networks for various reasons. First and foremost, you can find better deals on your keywords and therefore save yourself money when advertising. If you are willing to spend a lot though, you can still do the same thing while increasing your potential readers.
According to Alexa.com, the top 3 websites for traffic are Yahoo, MSN, and Google respectively.

Very interesting that you can advertise effectively and maintain a budget on the 3 highest traffic websites in the world.
Any Additional Recommendations?
If you did not already notice, the bid image above is from Yahoo! Search Marketing. I actively advertise there and really enjoy the way their services work. I have used both AdWords and MSAdCenter in the past, but I am currently solely with Yahoo.
If you are willing to spend time and knowledge learning about how to succeed, it is very easy and all of this can be self taught given you have some sort of motivation.
In the next few days you will see posts about Time, and Common Sense - In the meantime, figure out a niche you would like to work with and start tracking statistics of everything you can. The more information you have the better off you will be.