There is a misconception that a blog post has to be lengthy and comprehensive. My approach to blogging is one that is a hybrid of a traditional blog post with that of a Tweet. 240 characters or 240 words or less can give you freedom to post thoughts, current events going on in your life and other ideas. Make a point of blogging in the moment. Post a picture and add a little text to it. Some bloggers have word prompts such as the ones from https://wordofthedaychallenge.wordpress.com can help with getting your creative juices flowing. Also you can post your favorite YouTube videos and other media.
So when you find it hard to come up with a post you can go small for big results. The key is to keep on blogging, it can be fun again.