The following is advice Elder Paisios gave on spiritual growth after he was asked for his blessing by a visitor:
1. You must take care of the purification of your soul on a daily basis.
2. You must acquire divine justice and not logic, for only then the grace of our Christ will come to you.
3. Before you do something, think if Christ wants you to; the, act accordingly.
4. You must perfectly practice obedience, so you may later talk to others about the virtue of obedience.
5. The "no" you say to people must be "no", and the "yes" must be "yes". Do not pretend, but say whatever you think, even if it hurts the other person; say it in a good manner, however, and also give some explanations.
6. You must have and maintain this spiritual dignity; always pay attention to what pleases your fellow monks and not to what pleases yourself.
7. Everyday, you should read a section from the New Testament for the purification of your soul.
8. Do not look at what other people do, or examine how, and why they do it.
Your own goal is the purification of your soul and the perfect submission of your mind to divine grace. So everything for the sake of your goal; pray, study, say humbly the Jesus prayer, being aware that you absolutely need God's mercy. In other words, pay attention to your spiritual work. This is advice we can all benefit from.
Source: Elder Paisios of the Holy Mountain, pp 25-26