I have to admit it really can help looking at other blogs and seeing what they've wrote, and interpret that into your own idea. When I am writing a post i am normally in doors but I see a lot of people going outside with their laptops and typing away, This could work if you go to a nice peaceful place with lovely scenery it will get your creative side flowing and before you know it you've got a blog post.
Notes: Taking notes is a great idea i have a notebook my self of blog post ideas. I jot down a few ideas and it really helps me out it gives me a subject to write about and i already have notes to go along with. All that's left to do is put it all together.
Motivation: The main problem of having writers block is the lack of motivation. Think back to when you normally writing blog post what mood are you normally in? it more than likely will be a happy motivated mood. It's good to have something to write about you feel very passionate about, finding a subject like this gives you plenty of motivation. It wont just benefit you it will benefit your readers because they will notice that it has a positive sound to it and it will be more enjoying to read.
Do you struggle with coming up with ideas? let me know how you overcome in the comments.