A valuable source of help are newsgroups and mailing lists. A lot of users who know pretty much of LaTeX and its packages read and respond to these groups and lists. The two most important newsgroups for LaTeX are comp.text.tex (English) and de.comp.text.tex (German).
LyX has some mailing lists which are described on the LyX homepage. The archive can be found at http://email@example.com/ or http://news.gmane.org.