Genesis 2.0 has added a handy bit of CSS to clear all the floats all the time. This makes clearing floats constantly via extra clear divs obsolete and is just another reason why Genesis is awesome.

clear-all-floats-genesis.css

/* Float Clearing
--------------------------------------------- */

address:before, address:after,
article:before, article:after,
aside:before, aside:after,
audio:before, audio:after,
blockquote:before, blockquote:after,
canvas:before, canvas:after,
dd:before, dd:after,
div:before, div:after,
dl:before, dl:after,
fieldset:before, fieldset:after,
figcaption:before, figcaption:after,
figure:before, figure:after,
footer:before, footer:after,
form:before, form:after,
header:before, header:after,
hgroup:before, hgroup:after,
hr:before, hr:after,
main:before, main:after,
output:before, output:after,
pre:before, pre:after,
section:before, section:after,
table:before, table:after,
tfoot:before, tfoot:after,
video:before, video:after,
.clearfix:before, .clearfix:after {
 	content: " ";
	display: table;
}

address:after,
article:after,
aside:after,
audio:after,
blockquote:after,
canvas:after,
dd:after,
div:after,
dl:after,
fieldset:after,
figcaption:after,
figure:after,
footer:after,
form:after,
header:after,
hgroup:after,
hr:after,
main:after,
output:after,
pre:after,
section:after,
table:after,
tfoot:after,
video:after,
.clearfix:after {
	clear: both;
}