I don't use Freedom, but I do have a couple of techniques to keep online time in check. Unlike Freedom, all of these techniques are gratis.

One is technique is to block my favourite time-sink websites in the hosts file. It's easy to circumvent, but I find that a token barrier is usually enough to remind me to keep my behaviours in check.

When work is involved, I'll break my time up into blocks: work for two 15 minute blocks, take one fifteen minute block as a break. I've found that it's far too easier to concentrate on work when I know that I won't be doing the same thing for a five hour stretch.

When a lot of seat-work is involved, I'll simply go to a university library. Since I'm not a member of the university, I don't have internet access. When there isn't a university nearby, I'll just head out into the bush. (In other words, anywhere quiet and without an electronic tether.)

By the way, never believe the discipline/will-power crowd. I've found that a great many of them spend as much time wasting time as those without discipline/will-power. They simply don't see it as a problem. (They either have different priorities so it isn't a problem for them, or they refuse to acknowledge that it is a problem for them.)