Some Sharepoint lessons learnt... Just today

Some lessons that I've learnt today:

1- The Sharepoint control "SharePoint:SPGridView"'s columns' HeaderText cannot be bounded in the HTML design view with server tag's values

2- Always do backups for the Sharepoint applications' web.config (I had so many huge issues just because I tried to re-format a web.config file in the visual studio). Those file are better never touched... Take veryyy good caution... :))