John covered it. You can't save a bad image with post, but you can make a good image great... or a great image awesome! Also, much of the post processing steps really depend on how you shoot and what type of things you like the look of. Personally, I find JT's processed shot to be a tad oversaturated for my tastes (but I'm not the photographer or client, so it really doesn't matter what my tastes are).
My post is usually quite minimal. First off I shoot with zero in-camera sharpening, so do a USM in photohsop (I believe it's a 300, 0.1, 0). This typically results in an image that I'm happy with, but some shots need different (more or less) sharpening... there really isn't any global thing you can do to everything all the time. The next thing for me is rotating horizons or verticals if things are slightly off. I will then typically crop the image. I then set my white and black points for the images in levels... because I typically shoot a 1/3rd stop or so underexposed (I don't like loosing my highlights) I then need to bump up some of the low-end details using the shadows & highlights tool in photoshop (the same thing can be achieved using curves or the mids in the level adjustment). This is typically all that I do with an image unless there is something more dramatic going on.
As you can see, the difference is very minor. For the most part, if a shot needs more than just minor rotating/crop and levels then I will not use it. If I have to spend hours tweaking settings, creating masks, etc. then it's just not worth it for most things.