Are you getting ready? This appeared as the cover story in the latest issue of OSV, and you can read more about it at American Catholic.
What seems to be most repeated is the emphasis on Ecumenism, but I think the real blessing to the Church will be renewed interest in the Epistles and scripture study.
I encourage you to visit Scott Hahn's brainchild, the St. Paul Center for Biblical Theology. There you can take free online courses to develop your Bible savvy.
You can also obtain a plenary indulgence by participating in some public veneration of the Apostle to the Gentiles, if you're unable to make a pilgrimage to the Basilica Outside-the-Walls from this June to the next. Nunblog offers a novena to enrich your celebration.