If he/she has a computer...have them download e-sword. It has strong's numbers imbedded, so it's really easy to reference, and look up the meanings of words.
Encourage personal prayer and Bible reading. And unless you are really in opposition to church you attend, encourage them to try to apply everything that is preached or taught to their lives. There has to be SOMEthing good coming over the pulpit!!!

(Or else
you wouldn't be going there...right?)
There are some great generic Bible studies, but you should flip through them first and see if there are doctrinal issues that may be conflicting or confusing.
My husband bought a book (from a series) from our local Christian bookstore to go through with our daughters (ages 13 and 11). The lessons are REALLY good.
He bought this one:
http://www.mardel.com/store/item.aspx?ItemId=343762
...but there's a whole series, "Creative Bible Lessons In Romans", "...in Ezekiel", "...in the Old Testament", etc. etc.
The church is not where you discover your walk with God, anyway. That happens when you leave service and step into the real world. The place of assembly (e.g., the building) is just where you go a few times a week to fellowship, worship, and hear God's Word expounded upon--but it's when you leave service that the real work begins.
By the way, if this person was saved in one of these "services", then don't be so quick to be critical of it.

Someone's probably doing something right--it just doesn't sound like they have a good discipleship program in place.
If you plan to try to mentor this person, I suggest picking up "Becoming A Person of Influence" by John Maxwell. It's a great book! Before you can (or should) tell someone what they need to do, you need to develop a good relationship with them. Which is a little ironic, because on this forum, we're always advising strangers--LOL!!! But in the "real world", you really do need to work at the relationship first. That way you actually HAVE influence with them, and they will WANT to hear your opinions. Maybe.