I had a website that it`s homepage was on the first page of google.

After panda update it went down to the 5th page and lately, to the 10th page but now google shows an inner page and not the homepage.

What should i do?

Change only the homepage content? will deleting the website and start all over with new content will help? or should i wait and continue build links??

This site have about 150 pages....

Please advice,