How do you Outrank an Authority Site?

Ok, I have a keyword with 90,000 EXACT searches a month. ( Diet Niche )
Ranking #6 for that keyword.

The first 2 listings are EXACT match domains with hyphens in between them - Domain age - 7 years
The next 2 listings are from WEBMD & WIKIPEDIA
The next is everydiet.com
Then comes mine.

My domain is 6 months old.
Whatever i do i don't move beyond this point. Not an inch.
So, this is achievable or should i have to wait till i get old ?

What would you suggest to get it to the top atleast #3?

Maybe that is as high as you will go WH if you go BH you may get there - but then you will be waiting for the inevitable fall

UP2U!

i think #6 is already very nice considering the new domain ... you should be careful your linkbuilding strategy and make sure you don't overdo it or you might get hit !

Just keep building high quality backlinks, keep working on your linkwheel and you will keep ranking higher. You gotta think the website you're trying to outrank probably has a lot of people building quality backlinks everyday. It might be hard, but not impossible.

Being being a highly targeted niche site which is very relevant.

Amazon may be huge but it won't outrank a site dedicated to a specific problem/product(as long as the site is useful and high quality).