Imagination is a decision. If you say you don’t have an imagination, you probably won’t come up with anything worthwhile. If you decide be imaginative, you never know what might come of it.
I frequently let my imagination run wild. As a result, my imagination muscles are happy and strong and I find it easy to come up with ideas and solutions. Unconstrained imagination isn’t particularly productive but it definitely feels good. Therefore, I suggest having an imagination practice every day. My daily blog is one of the activities that serves this purpose for me.