1. 336x280 - the large rectangle
2. 300x250 - the medium or inline rectangle
3. 160x600 - the wide skyscraper
So now you can put those banners all over the place in your site and you will get rich! Unfortunately no! First of all you have to check if those banner fit to your site. Maybe you need to change the display and then your site doesn't look natural anymore. On the other hand it seems that the least performing banner is the 468x60 banner.
If you have a lot of content you can add some small add in the middle and make it look as part of your content. Popular size to do that is the 300x250 banner. It is easy to wrap the content around that banner but it should be done if you have enough content to put around. If you have less content you can try with the some smaller ones of the following size:
125x125 Button
180x150 Small rectangle
200x200 Small square
Then, once you decided on the size and where to put the ad you have to chose the colors. You can chose some discreet colors in line with the colors and font of the site. In that case you make the reader believe that the ad is part of the content in the hope that he will click.
Or you chose something that is really outstanding with bright colors so that you are yelling that this is an ad in the hope that the user will see it and click on it.
Which strategy you should chose? I don't know! Try both, make some tests and compare the results. Try with one type of ad for a periode of time that is long enough to have enough data and then try with another type of ad for the same period of time. You need to test many things and keep records of everything you changed and how it impacted your CTR (click thru rate) but don't do too many changes at a time or you will not be able to know what impact your changes had.