Since I actually took a few pictures, I figured I'd go ahead and post them. Here's the way I cut a pepper, boys. Now you can't say that you don't know how. Wash them first, and then, holding it upside-down, cut in half lengthwise. Stop just before you reach the stem and break the pepper in half.
Then pull off the stem, and the majority of the seeds will come off as well. If the membranes bother you, you can scrape them off with your fingers as well.
Then slice lengthwise and you have pepper strips.
If you want diced pepper, cut again at 90°. There you go!