I distilled down into a one pager (front and back) what I wish I would have known as a young, single Catholic man.
At that time, I had discerned that I was called to marriage and not to the priesthood nor religious life.
You need a solid supernatural (or spiritual) foundation in the Catholic Faith, but then also need to cultivate natural qualities (things like: manners, dressing in a respectful way, etc.).
You can download the guide below and print it out yourself, and also you can watch the presentation where I explain the guide in more detail.
Take this guide as a launching or starting point for having a discussion with other young men. No one size fits all for every man, and each man has his own talents, strengths, weaknesses, and blind spots.
Here's the link to My Daily Bread, excellent topics for Mental Prayer.
Devin Rose, Lionheart Catholic
P.S. In the guide and video I mention this great holy card for St Joseph: