One: put the repeat work under contract
Turn the customers who come back every year into customers who are committed to coming back. Contracted revenue is the cheapest valuation uplift available.
Two: make yourself replaceable
Name a deputy, hand over the pricing decisions, introduce a second contact to your biggest accounts, and take a proper holiday to prove it works.
Three: tidy the paperwork
Signed contracts, current leases, written employment terms, clear ownership of vehicles, software and intellectual property. Dull work, immediate effect on diligence.
Four: clean up the profit picture
Take personal costs out of the business a year ahead so the accounts show real trading performance rather than a list of add-backs a buyer has to take on trust.
Five: reduce concentration
Win two or three accounts in the size bracket below your largest. Spreading revenue is slower than the other four, but it lifts the multiple more than any of them.