2013 Adaptive CSS Containers Snippet. From 1600+ to Mobile. This snippet will keep a nice margin on the sides of your container for browser size most used in 2012. It's not a Responsive Snippet, that would be using %.

2013 Adaptive CSS Containers

/*~~~~ CONTAINERS December 2013 - http://www.w3counter.com/globalstats.php ~~~~*/
/* 1600x900   4.09%  */
.container{
    margin: 0 auto;
    padding:0;
    height:auto;
  width:1410px; /* 3 Columns would be 470px */
}
/* 1440x900 	5.26%  */
@media (max-width: 1440px){ .container{width: 1230px; /* 3 Columns would be 410px */ } }
/* 1366x768 	20% */
@media (max-width: 1366px){ .container{width: 1170px; /* 3 Columns would be 390px */} }
/* 1280x1024 	5.20% */
@media (max-width: 1280px){ .container{width: 1020px; /* 3 Columns would be 340px */} }
/* 1024x768 	12.06% */
@media (max-width: 1024px){ .container{width: 960px; /* 3 Columns would be 320px */} }
/* anything below 960 is Tablet vertical or phone -  768x1024 - 5.06% */
@media (max-width: 960px){ .container{width: 100%;} }


/*~~~~ CONTAINERS November 2012 - http://www.w3counter.com/globalstats.php ~~~~*/
/* 1600x900   3.70%  */
.container{
    margin: 0 auto;
    padding:0;
    height:auto;
  width:1410px; /* 3 Columns would be 470px */
}
/* 1440x900 	5.97%  */
@media (max-width: 1440px){ .container{width: 1230px; /* 3 Columns would be 410px */ } }
/* 1366x768 	19.20% */
@media (max-width: 1366px){ .container{width: 1170px; /* 3 Columns would be 390px */} }
/* 1280x1024 	7.08% */
@media (max-width: 1280px){ .container{width: 1020px; /* 3 Columns would be 340px */} }
/* 1024x768 	14.07% */
@media (max-width: 1024px){ .container{width: 960px; /* 3 Columns would be 320px */} }
/* anything below 960 is Tablet vertical or phone */
@media (max-width: 960px){ .container{width: 100%;} }

Here's a template I used it in. http://revitalagency.com/sandbox/2013-adaptive/