I'm a solopreneur and feel this is an area I need to improve on.
The easy answer is Yes! You must review results on a consistent basis to hold yourself accountable but to also analyze what went well and what did not go well. Too many times business owners fail to make adjustments based on the feedback they are receiving.
Having a mentor or peer you can discuss these results is ideal but if do not have that luxury getting a expert in your industry as a free lance coach/consultant on the phone once a month is a option to consider.