1) create a file called ‘searchform.php’ in your theme folder
2) paste the following into the file

<form role="search" method="get" id="searchform" action="http://yourblog.example.com/" >
	<div><label class="screen-reader-text" for="s">Search for:</label>
	<input type="text" value="" name="s" id="s" />
	<input type="submit" id="searchsubmit" value="Search" />
	</div>
</form>

3) save the file, and reload. You should see the default search box appear, so pretty much at this point just change out ‘yourblog.example.com’ to your address, and the customize the form. I just got rid of the ‘search’ button on mine. Yea for general usability you may want to keep that. For me, im always pressing ‘enter’ instead of clicking buttons to search. Good design consider’s the user experience and build from that… and since im building for me, i’ll just ditch the button.