Today, I wanted to discuss with you the size of the photos you upload to your posts.
If you have a camera with lots of mega pixels and upload photos from it straight into your post, the pics will be large in terms of pixels. This means they will look nice BUT
1 They will tend to make your post load more slowly for your readers – who may not have unlimited bandwidth; and
2 They will count towards Blogger's photo limit. This means that some day, maybe quite soon, you will find yourself unable to upload photos unless you organize to pay more!
You can avoid both these consequences simply by resizing your photos to be under the size that gets counted for Blogger's photo limit. I resize to 500 pixels but I understand the limit is 800x600. Here is a link to an article that discusses this issue.