If you write with any regularity, you are familiar with writer's block.
With this blog, it happens from time to time. However, I have been blessed. There are several sources of inspiration:
Several readers write me often.
Frequently, AR15.com will have news or other stories relevant to this blog's interests.
I have a couple of twitterstalkers who are always good for some humor/insanity/etc.
Facebook is a great source of inspiration.