Sounds pretty good actually. Well the first thing you need to do is PROVE success. In a family business this can sometimes be hard because you don't really have the same boss oversight like you would in a corporate situation (it's most likely a dad or uncle or something), so the question is how can you CONCRETELY prove that you are doing a great job? Very often this will be through your work - Did you l and the biggest client in company history? Did you double sales? triple the workforce size? REduce overall costs by 30%?? All such things are very helpful to prove that you are a strong candidate. Beyond that, yes, it's a very good idea to do whatever you can to increase your involvement outside of work. Join/lead at least one community service group/event regularly over the next years. If you have any other projects like startups or advising, it can be good too.
Then of course, rocking the GMAT helps a lot too!
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