As there are a couple of ways to Add this in blogger
but i am going to tell here the simplest of all in this case you dont need to customize your blog through html
So we will add "you might also like this " through www.linkwithin.com
So follow these simple steps
1 : Goto www.linkwithin.com
2: Enter your Email
3: Enter your Blog Address
4: Select your platform as blloger ow wordpress etc ....
5: Select no of Stories 3,4,5 ......
6: Then click get widget
7: Then you will be redirected to your Design =>Page Elements Page
8: Click save and there you are GOOD TO GO :)
Comments are appreciated :)