This a few shots from the past few years. This summer I got a job taking pictures for a book, and I need some tips, so be harsh. Any advice is great, thanks!
the third photo has perfect exposure and a nicely framed composition using the trees. your last photo has exposure problems, looks like a lot of blown highlights.
your first photo is fine but I almost feel a different setup taking the sun out of the composition would be better especially if you could incorporate some of the colorful clouds. Its tough even for someone looking at a photo in which the sun is so bright.
Not bad overall though!