It's possible that I shouldn't try to other-optimize here, but in the case of recent comments, I wonder if it'd be practical to make a folder on your computer where you save a copy of the latest-comments page when you see something interesting, telling yourself you'll look when you have more time. Or first retrieve all recent comments (with wget or cURL, or just right-clicking and saving), then turn on Leechblock to look at them, so you at least have an inconvenience barrier between writing a comment and posting it.

On another site, I found that first writing comments without posting them and then saving threads without reading them helped me feel less anxious about missing things, although I've been backsliding recently.

Share Your Anti-Akrasia Tricks might be useful to save and read offline, or print out if you want to go extreme.

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