I'm enjoying the writings of Ryle at the moment, most of my reading has been of online articles.
Here's Ryle's main points under the section "General Counsels to Young Men" in the article "Thoughts For Young Men".
(1) Try to get a clear view of the evil of sin.
(2) Seek to become acquainted with our Lord Jesus Christ.
(3) Never forget that nothing is so important as your soul.
(4) Remember it is possible to be a young man and yet to serve God.
(5) Determine as long as you live to make the Bible your guide and adviser.
(6) Never make an intimate friend of anyone who is not a friend of God.
And in "Special Rules for Young Men" his outline is;
(1) For one thing, resolve at once, by God's help, to break off every known sin, however small.
(2) Resolve, by God's help, to shun everything which may prove an occasion of sin.
(3) Resolve never to forget the eye of God.
(4) Be diligent in the practice of your Christianity.
(5) Resolve that wherever you are, you will pray.
These points and the whole article can be read in full here