Try to be accurate, rather than self-effacing or grandiose. The ability to sort things out and make balanced judgments is the hallmark of a good executive, and this is as good a place as any to start. For those areas where you score less than 7, you'll need to start finding good remedial experiences. Your HR department, again, might be a place to start, as long as there's somebody there you trust and believe is knowledgeable. Off-site seminars and courses.
Most companies have relationships with a variety of trainers and schools.
Distance learning opportunities. This is a burgeoning field, and you can check it out on your own or see what your company recommends. Individual courses at a local college. Some people prefer to take courses on their own rather than under the aegis of their employer. Conferences and conventions.