Mobile Website

Hey you guys, i want my mobile site to be usable and look nice but when i pull up my website on my phone, the home page is cut off, and the menu bar is off to the right. how do i get my site to look the same or better on a mobile device
if any of you have iphones 4s or i think any iphone youl see what i am talking about.
my website is “onestopleasinginc.com”