First and foremost, think about a situation or a target group in need of a Fixer.
Don’t dwell on the first ideas, make sure your starting point is distinctive.
You look for suitable services that your Fixer will offer and work them out. Make sure that the services differ sufficiently from each other but that they fit within your concept. Your Fixer may not really exist yet, use your imagination and creativity.
Choose a visually interesting concept that you can use visually.