link to site?

Hi.
You should change background.
Don't use so much color on one page.
Learn the basics of design.

Yes you should simplify a lot. The header image imo have nothing to do with the general theme (coupons) and the different colours in the text below the girl is also too much. If you fix those 2 things the site will a lot more modern

I am sorry to tell you that but it is out dated.