1) I'm a BT, but this is relevant to you even if you're an FFB. I basically have the mind of an FFB now - I know so many so closely I know that's right - and so I'm going to use this eitza myself - starting tonight.
2) This is not about the internet, but it is applicable to taivas nashim (or others) bichlal.
3) I was 24 and had been becoming frum for a few years already when I went to a Lubavitch (BT) yeshiva.
4) Like all Lubav bochrim I went out to do mivtza tefillin, i.e. putting tefillin on men in the street, shops etc., every Friday afternoon. My route was all around Ben Yehuda Street, ie. the Times Square of Jerusalem. I don't think I need to explain what was there for me to look at, especially in the summer time when school/college was out for the holidays.
5) I SWEAR to you that as a single, red-blooded man (having previously thought about, looked and done all the things you would expect of a young irreligious man) I did not look at or think about anything I should not have, the whole time I was there! Every Friday! Not only that, but I didn't even find it a challenge.
6) Even when I came back to my home town, still as a young single man, and took the train to work every day, it was the same story. There was nothing to look at, and there was no challenge. I swear.
6) Q: How did I do it?
7) A: All I thought about was G-D.
8) It sounds simple, but it took me years of learning Chassidus to get there.
9) So the answer to this, for me and I hope for you, is to think about G-D and get to know him by learning Chassidus.