Stay focused on the goals set forth in your strategic plan. Goals should change only when there is compelling evidence that your direction is inappropriate. If the plan is well conceived to begin with, this will rarely be the case. If you tend to be an anxious person, make sure your stress doesn't interfere with good judgement. Just because you have a setback or two doesn't mean that a shift in your priorities in needed.
Every business encounters setbacks of some sort.
Expect them and deal with them. When a business is initially successful, it is generally in one type of business. That success often leads owners and managers to begin thinking they can make any business successful. They start thinking about diversifying into other types of businesses. The reverse of this is when a business is struggling and the owner or manager believes that the only way to achieve success is to diversify.