Need some help with Golden Hour photography

Before the posts above, I went out again last night. Here's the results. As you can see for the larger shots I still have a problem with sharpness, though these were taken at F22 so I wonder what aperture I could have used instead, and where I could have focussed to get a sharper result in the rear of the images. Note I've post-processed these a bit.

[url= http://www.flickr.com/photos/41781541@N03/7743772402/][img]http://farm8.staticflickr.com/7269/7743772402_e47be08d62.jpg[/img][/url]

[url= http://www.flickr.com/photos/41781541@N03/7743772402/]P1000411.jpg[/url] by [url= http://www.flickr.com/people/41781541@N03/]Jigsawn[/url] , on Flickr

[url= http://www.flickr.com/photos/41781541@N03/7743773848/][img]http://farm8.staticflickr.com/7106/7743773848_e701b47371.jpg[/img][/url]

[url= http://www.flickr.com/photos/41781541@N03/7743773848/]P1000417.jpg[/url] by [url= http://www.flickr.com/people/41781541@N03/]Jigsawn[/url] , on Flickr

[url= http://www.flickr.com/photos/41781541@N03/7743778608/][img]http://farm8.staticflickr.com/7139/7743778608_f18a2688d9.jpg[/img][/url]

[url= http://www.flickr.com/photos/41781541@N03/7743778608/]The Scottish Borders[ url] by [url= http://www.flickr.com/people/41781541@N03/]Jigsawn[/url] , on Flickr