I refuse to give any placement advice to people who have so obviously copied content and have also not even given a source for their articles. Very sad. You're violating Adsense policies about copyright (as well as the copyright in force at places like ezinearticles where you've copied some of your content from)
First of all If you are copying content its against the TOS of Google, as Adpubster has said. Any way switch to three column blogger template. Add a catchy header and beneath it add 728 x 15 horizontal row. You can add more ads units in your block , Add large rectangle before the start of the first post so that when some one opens your blogs finds the ads related to your blog and click on them , this will increase your CTR.
What I found so far is that 336 rectangle add pays and clicks the best and it is hardest to place it on page, so when you next make a site keep in mind that you want a space for 336 ads