This is a typical question for those who have yet to venture into operating a business, assuming the business you mentioned is profitable and without shrinking demand you should already feel comfortable to operate it and expand it because growing a business, except for pivoting and or seeking investments, is really nothing more than hiring more sales people, putting in more hours, being friendlier to your customers.

Obviously each of these implies its own "to-do" lists but you can start tackling it with follow up calls, end of work surveys, referral discounts, offering limited time only options, match competitor prices, etc...

I hate to say this, but many questions are better asked over the phone and better explained and results. Give me or any applicable person here a call and let's talk about your business in particular and what approach can help you change your mindset by applying easy to track changes into your business :)