This little piece of collage is an example of how the less obvious things can really be inspiring. It is all about the interpretation.
Here's what I do.
When I find something that gets my attention, I analyze it into pieces. For example, if I see a photo in the newspaper that I find attractive, I try to find the reason why I do so. It can be a color combination, an atmosphere, a composition, a small detail that looks nostalgic for me etc.
Let's assume I have now found that very thing that caught my eye. I then start seeking for analogies, the stuff that has that same factor. Soon I am filled with ideas that I am really enthusiastic about!
The story about the insect? I was thinking about the curtains of our library room (Compton by William Morris) and how I love them. They have very detailed floral ornaments that I absolutely adore. Actually, they reminded me of botanical plates. And I never had thought before how ornamental old botanical drawings really are! I went to a local library and browsed some botanical books, then accidentally found the book about insects and was totally hooked: I wanted to draw insects with ornaments, sort of go back to the concept used in the curtain. I would never have thought insects being so ornamental without deriving one thought from another!
Hopefully my method is useful for you too!