Focus: As the owner of a small business you must stay focused on three key areas:
Make the expected profit on everything you sell. You must know the labour and material component of cost and how that relates to expected cost. You must also watch for the "trapdoor". The trapdoor is where costs go without being noticed. These include non-productive labour e.g. you pay someone 40 hours but only 35 gets booked to jobs. Or where materials get wasted and not recorded against a job or materials are left over and "lost".
Overhead to sales: How much sales do you need to cover your overhead - that is your breakeven sales. You should know exactly how much sales you need on a daily basis and also how many labour hours you need to bill out to cover your overhead. If you have more than one department you need to do this by department.
Identify the sales that generate the best profit and build those. Eliminate the sales that generate marginal profit. Make sure you look at how any change in sales mix will impact your overhead. Different departments have widely differing needs in overhead.
And one more thing... (As Steve Jobs would have said)
Most of us as business owners are too soft. We neglect to make the tough decisions of holding others accountable. So TOUGHEN UP; it's your business, your livelihood and your first responsibility is to yourself and your family.
More money, more fun!