Our community is growing and many people are around who are expert in various parts of TeX and friends.
While the site is a very good place where looking for ideas and help when we have a problem to solve, a traditional paper about a topic might be much more helpful.
There are a few journals devoted to TeX, typography and related topics and contributing to them would surely improve the knowledge basis, especially considering that the journals' issues become free reading after a short time. Hence contributions to TeX related journals are Welcome! from fellow TeX Users to share their knowledge and experiences. Below is a few list of notable Journals and their website information for prospective authors:
http://tug.org/TUGboat (main page)
http://tug.org/TUGboat/location.html (information about submissions and deadlines)
http://www.guitex.org/home/en/arstexnica (main page)
http://www.guitex.org/home/en/collabora-autori (information about submissions)
Die TeXnische Komödie
http://www.dante.de/DTK.html (main page, German)
http://www.dante.de/DTK_en.html (main page, English)
Feel free to add other journals and suggestions