At web size, everything loooks sharp here except the foreground leaves. Not sure they need to be sharp, but they are stand-ins for the rocks in Daves image, so for practice they should be.
You do have a different type of scene here. No real distant elements like Daves mountains. If you look at hyperfocal tables, using a 40d and 24mm at f16 you can focus close (like 10 feet) and have everything ok from 3.85 feet to infinity, or focus at infinity and have everything ok from infinity to as close as 6.22 feet.
See what happens here, even if you dont like hyperfocal, it tells your something. Focus close if close stuff is most important, and focus far if the distant mountains are critical, and stop down. Decide which end can be a bit fuzzy (which is what the word acceptable stands for in hyperfocal theory).
You had no distant stuff in this scene, maybe 500 feet or so out that was important. I would have focused close for this one and stopped down.
I practice this stuff in my front yard where it is easy to measure focus distance and then look at results immediatly on my computer.
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When you can't focus, nothing else matters
Once you can, everything else does.
http://ben-egbert.smugmug.com/
Ben