It's a bad idea to pigeon hole yourself into "hanging around" one type of person or one people who are dominant in one type of trait. The whole reason people build teams is to maximize differing traits to gain the most value from each. You'll gain the most from life from leaning to recognize this as early as possible.
In this case, people that "get things done" at youth levels are generally those with strong implementation skills - the "doers" of the world if it were. But implementers are only part of the picture. There are several other personality types that are just as beneficial to outcomes, and by excluding them you exclude many strengths in the name of pure productivity.
eykanal leads into this in his comment but I'd like to expand on it a bit.
Stereotyping examples here for ease of explanation:
People with strong vision and ideas tend to be able to see 10 steps ahead of others. However these people also tend to be horrible at getting things done on their own. Their joy is looking forward, not being in the moment. Without these people however, we cannot move forward. These people will be the ones that think it would be neat to build an Eiffel Tower out of toothpicks in the first place.
People with an eye for detail tend to be strong editors/coaches etc. These people might not dream up new approaches or work hard to see them to completion, but they are experts at critique and can notice, for instance, that the toothpick Eiffel Tower could be 3 feet higher if you simply adjusted the angle at which you glued the toothpicks together by 5 degrees.
People who "get shit done" often tend to be implementers. They may have seen that toothpick Eiffel Tower in a book or heard about it from a friend, but they went out and got the resources and started putting things together.
My entire point: None of these people are more or less valuable than any other. It isn't the skill-set that is the important variable, but the degree at which the person employs their talents that matters. Suggesting your child should "hang around" the implementers while discarding others is basically teaching them that only certain key talents are valuable and the rest are garbage.
That type of thinking actually reduces their long term chances of success, because like it or not, no one person can be outstandingly good at every viable human talent. People who realize what they aren't good at will team up with others who excel in that talent and will get much further ahead overall.
Accept and reject individuals. Don't evaluate personality types. Some of the most profound thinkers in history were slackers. Some of the best coaches of elite athletes suck at the sports they teach.