If you are struggling with your blog posts it can help to plan them out beforehand. Pick a theme for a month and work on that.
Over at Productive Flourishing you will find a blog planner that is very helpful. In fact there are a couple of planners that you might find helpful. They don't give you topic suggestions but they will help you plan and track your posts.
Last time I was there the site was having a couple of issues but persist. It is worth it.
The planner is issued each month if you like to keep track during the year. There is a calendar and planner. There are other tools on the site, too, so have a look around while you are there.