I've tried left and right to find how to add thumbnails to my posts but I can't figure it out. Anyone help me out with this? Options I've found on google didn't work either.
Usually a theme will come with an image re-sizer script that will run once you add it into a custom item. The custom item will also need a very specific and case sensitive name value added to it, followed by the image url. Again, I think it depends on the theme you are using, but this follows the typical setup.
I'm using poker spades theme. It allows for thumbnail but i'm not sure of the value. diehardpoker.net