If you do many giveaways on your blog, you know one of the most tedious things is counting out the comments to get to the winner after the randomizer chooses one. After many, many failures here's what works for me.
This is a VERY basic numbering, if you want fancy you will have to look elsewhere.
If you find this easy tutorial useful, feel free to spread the word, we'd really appreciate it. Knowing we helped someone avoid the headaches and hassles really brightens our day. :-)