Although, Boruch Hashem, I'm over 22 months clean, I have decided to strengthen my defenses while things are going well.
To that end, there are two new developments:
1) I switched to Jnet with the "Mehadrin filter" as my Internet service provider. That's on top of the K9 filter, which I see no reason to remove, and third party monitoring software (eBlaster). Jnet has different levels of filtering (I'm using level 3), and the Mehadrin filter can be used on top of any of those levels. The Mehadrin filter (which actually comes in 3 levels - I'm using the intermediate level) blocks (or distorts) most inappropriate pictures that may be found on otherwise "appropriate" sites. It works very well, although it blocks some completely innocent pictures as well. Jnet is costing me quite a bit more than I was paying for Verizon, but I believe it's worth every penny. I highly recommend it to anyone for whom protection is more important than price (where price is an issue, nothing beats the free K9 filter).
2) I receive a certain health magazine, which I find very useful. The problem is that it often contains immodest pictures, so I always have to be ready to look away and turn the page. Not a very good situation. I just called the organization that puts out the magazine, and told them that I no longer want to receive a paper copy. I realize that, since they have the magazine online, I can access the information that way, and the Jnet Mehadrin filter will remove the vast majority (if not all) of the inappropriate pictures.