well in that case why not have...
<form action="mail.php" method="post">
Your email address: <input type="text" name="email" />
Your tutorial title: <input type="text" name="title" />
category: <select name="category">
<option value="strings">Strings</option>
<option value="forms">Forms</option>
<option value="mailers">Mailers</option>
(etc...)
</select>
<textarea name="tutorial" rows="14" cols="30">
</textarea>
<input type="submit">
</form>
then a php paeg with this code
<?php
$email = $_REQUEST['email'];
$title = $_REQUEST['title'];
$category = $_REQUEST['category'];
$tutorial = $_REQUEST['tutorial'];
$body = "Hello steven\r\n
you've recieved an email from $email about a tutorial for your site, the tutorial is titled\r\r\n$title\r\n and is as follows:\r\r\r\n$tutorial\r\r\nthanks for your time!";
mail("your email address here", "Tutorial mailer", $body);
?>
you may have to look up that I've used the mail function correctly...
If this is too messy, then perhaps you should combine it with a file upload script, (however allowing people to upload files to yuor server could see people trying to abuse the service, and uploading rubbish to use up yuor disk space.