3 text ad units 1 link unit ads and 1 search engine you can ad to your blog so that your click rate will also be good and looks of the site also remain good hope this will make you clear now ...
I want to see your blog address then i will told you. Blog advertising depends on you blog size and space.:
ahhh.. great to this means that i can still ad an adsense box to my site. i only did put three adsense for contents. thanks
Why are some of you just guessing - many of you are giving wrong information!! You need to read the official Google support pages: https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=9735