1) Imitation in the formation of a new Christian is extremely important. I would compare it to buying something new that has to be put together. Without instructions or picture to compare what we're making, we're completely loss. I think a new believer is in that same position. Without someone to lead and God it's easy to go off course or just give up.
2) Small groups, one on one discipleship
3) The character of the leader is vital. New believers are hungry and willing to follow. The direction they go often depends upon the one that's leading.
4) You can't say its impossible to grow apart from a strong Christian community because some people have no choice in their situation. So the real question to me would be if it is our choice not to participate in a body of believers can we experience continual growth? Yes, but it's a whole lot tougher so why even try to make it on our own.
5) My character to my family and spiritual children is everything. Who I am now or what I leave behind in the way I led my life will leave an impact. Good or bad the choice is mine.