I'm not sure of the official position, but I would probably look for a section of the forum that applies to your howto, then put something there. For example, if I were really proud of my page on dwm, a tiling window manager, I might post something in the window manager section to the effect of hey folks, I just made a page on dwm, if you use it, or have interest in it, please take a look and let me know what you think.
I don't _think_ the moderators will complain about something like that, but one never knows. (I suppose a lot would depend upon the page, e.g., if, when going to the page, an almost unkillable video blares out, or if the article was horrible).
And, if it's in response to a question--for example, if someone says, how do I this with ffmpeg and I have a page that covers that, I think it's certainly appropriate to say, I cover this on my page, and post a link to the page. Again, assuming that there's nothing really inappropriate about the page. I have often posted links to pages of mine that seemed appropriate to questions on the forum and haven't been criticized for doing so.
