Looking over this list and I see three areas that house the most caches.
Greater Katy Area - Lots of puzzles seems like the new blood out there needs to go look for these.
Clear Lake Area - A nice grouping of caches
Lake Jackson/Angleton area - Lots and lots of traditionals. Seems like a small group of cachers should get together and make a run on these way down there. This would gut 1/3 off the list alone.