Getting good images is always a challenge for me. I spend a lot of money on camera equipment (so I can't use that as an excuse), spend a lot of money on travel expenses (gotta get to where the shots are), more money on clothes (so far I've spent over $1,000 in warm clothes, didn't need any before this trip)and yet I often come back disappointed.
For example, I went to Zion on Christmas day, used the 600mm, and the shots are not as sharp as I want. I need to figure out the reason. I will be unhappy if I come back from Yellowstone with images that are less that good.