How do you guys find your keywords??

http://tools.seobook.com/keyword-tools/seobook/
https://adwords.google.com/select/KeywordToolExternal

<?php

// $iterations = rand(25, 500) //pick some number of keywords to run each time the CRON fires.
//create a weighting function that says if the number is lower, sleep for a random period between runs that adds up to the total time of the bot allowance. if higher, run faster.
$iterations = 500; //or use the rand function above
$dupes = 0;
$whoops = 0;
$username="dbaseusername";
$password="dbasepassword";
$database="dbasename";
$seed="";

mysql_connect(localhost,$username,$password);
mysql_select_db($database) or die( "Unable to select database");

for ($count=0; $count<$iterations; $count++) //count each keyword up to the max as determined by the rand above
{
$seed="";
$seed = getNextKeyWord(); //assign the value returned by the function getNextKeyword to the variable $keyword to be used in function scrapeResults
echo "THE SEED KEYWORD IS: $seed \n\n";
$keywordlist = scrapeResults($seed);//execute function scrapeResults using the keyword gathered above to get google suggest results
saveResults($keywordlist);
//check the results to see if they already exist in tblSuggest. If not, add them.
echo "\n\nOk, we're gonna try this one now. Wish me luck, boss. \n\n We're trying to take $seed out of action...";
updateTBLSeed($seed); //note: if the scrape is successful, that's the point at which tblMaster should have the suggest value changed to true
echo "Sorry boss... you commented out everything else... just sitting here... <yawn>\n\n";
echo "\n\n\n\n\n\nSLOWING THINGS DOWN HERE!!!!";
$slp=rand(3,55);
echo "\n\n\nSo far I've done about $count runs. There are more to go.\n\n\n";
echo "\n\n\n\n\n\n\n\nGonna nap for $slp seconds. brb.";
sleep($slp);
}
mysql_close();
die ("Well, we got ".$dupes." dupes, and ".$whoops." whoops on this run, boss! \nSorry about that!\n\n\n");

	function getNextKeyWord()
		{
			$result = mysql_evaluate_array("SELECT pk from tblSeed WHERE suggested !='1'"); //select pk values that have not already been used
				if ($result == 0)
					{
						die("Ran out of Seed Words boss...");
					}
			
			$numRows = sizeof($result); //count the number of results
			echo "Maybe... \n\nLooks like we got us about: $numRows rows, boss \n\n";
			$id=rand(0,$numRows); //generate a random number between 0 and count_of_rows in the database.
			$query = "select keyword from tblSeed where pk = \"".$result[$id]."\""; //define the pk as the $id_th array element in a query to get the keyword out of the dbase
			$nextkey = mysql_evaluate($query);
				if ($nextkey=="undefined")
					{
					die ("Got an undefined here from function mysql_evaluate, boss");//get the keyword
					}
			else echo "Got one: $nextkey \n\n";
			return $nextkey; //send it back to the function call
		}
		
	function mysql_evaluate_array($query) 
		{
			$result = mysql_query($query);
			if (!$result) 
				{
					die('AAAAARGH. mysql_evalute_array function Could not query:' . mysql_error());
				}
			$values = array();
			for ($i=0; $i<mysql_num_rows($result); ++$i)
			array_push($values, mysql_result($result,$i));
			return $values;
		}
		
	function mysql_evaluate($query, $default_value="undefined") 
		{
			$back = mysql_query($query);
			if (mysql_num_rows($back)==0)
			return $default_value;
    else
			return mysql_result($back,0);
		}


function scrapeResults($keyword)
    {

        $ch=curl_init();
        $useragent="Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1"; 
        curl_setopt($ch, CURLOPT_USERAGENT, $useragent); 
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
        curl_setopt($ch, CURLOPT_RETURNTRANSFER  ,1);
        curl_setopt($ch, CURLOPT_URL,"http://clients1.google.com/complete/search?hl=en&q=".urlencode($keyword));        
        curl_setopt($ch, CURLOPT_REFERER,"http://www.google.com/webhp?complete=1&hl=en");
        $data=curl_exec($ch);
        curl_close($ch);
        $data=substr($data, strpos($data,"[[")+1);
        preg_match_all("/\[\"(.*?)\",\"(.*?) results/si", $data, $out);
        return($out[1]);
      
       
    }


	function saveResults($list)
		{
			
			for ($i=0;$i<sizeof($list); $i++)
				{
					echo "Slapping this on into the dbase, boss: ".$list[$i]."\n\n";
					$query = "INSERT IGNORE INTO tblSuggest (keyword) VALUE ('$list[$i]')";
					mysql_query($query);
						
				}
		}
		
		function updateTBLSeed($seed)
	{
		$query = "UPDATE tblSeed SET suggested = '1' WHERE keyword ='$seed'";
		mysql_query($query);
		echo "Took this one off the list, boss: $seed \n\n";
		$cleared=mysql_evaluate("select suggested from tblSeed where keyword = '$seed'");
		if ($cleared > 0)
			{
				echo "It's set to $cleared!!!\n\n";
			}
		else
			{
				echo "Dang. It's still: $cleared...\n\n";
			}
	}
?>

http://en.wikipedia.org/wiki/Category:Future_products
http://www.webmd.com/default.htm
http://downloads.zdnet.com/topsearch.aspx
http://azlist.about.com/
http://buzz.yahoo.com/buzzlog/
http://www0.shopping.com/top_searches
http://www.seomoz.org/popular-searches/index/2009-08-11
http://www.43things.com/zeitgeist/popular_goals