I used to live life by the question, "God, how far can I keep my thoughts from you and still be OK?"
Now in everything I try to focus on, "God, how can I be closer to to you, how can I experience your presence more?"
God's been replacing a lot of things in my life as a result: TV, music, topics of conversations, with things that refocus my attention on Him. Not to sound hyper-holy though, I still listen to secular music every once in a great awhile, enjoy good cigars, designing my next tat, etc., but if God wanted to replace those with other pursuits that draw me closer, it wouldn't be an issue, it would just happen.
Listen for the checks by the Holy Spirit, press into God and everything else concerning your freedom in Christ will take care of itself. It's a matter of trust that God doesn't just want what's good for you, he want's what's best for you and when you go along with that trust, you never give up anything of value compared to what He gives you in replace.