Music is weird. Get weird with it. There are no cut and dry answers, obvi. Here are a few steps I take when I have the Verses first...
1. Do the verses have a general theme?
2. How did I start the verses? Can the last line of the hook lead into this?
3. (Opposite from above) What are the last lines in the verses? Can I Transition this into the first line of the hooks?
4. Dammit now I need to Alter the verses to fit my now great hook. lol