Now that you have picked the top idea, go forth and finalise the design! Touch up on your sketches before digitizing and refining them.
You think your work is done once you’ve saved that design? Sometimes testing it out is crucial. Have yourself or your friends compare it with the standard logo for your client’s industry, and see how your design measures up. Does it get lost in the other designs or does it actually stand out?
You should also run your final design through google images search to make sure the form isn't too similar to an existing design.