Here are links to resources for
- language documentation equipment (advice on audio and video recorders, microphones, headsets, etc.)
- language documentation projects (examples from around the world)
There is a growing literature on language documentation. Here are some of the foundational articles and books.
Gippert, Joost, Nikolaus P. Himmelmann and Ulrike Mosel. (eds.) 2006. Essentials of language documentation, Berlin: Mouton de Gruyter
Himmelmann, Nikolaus P. 1998. Documentary and descriptive linguistics. Linguistics, 36.161–195.
Himmelmann, Nikolaus P. 2008. Reproduction and preservation of linguistic knowledge: linguistics' response to language endangerment. Annual Review of Anthropology, 39:337-50.
Woodbury, Tony. 2003. Defining documentary linguistics. In P. Austin (ed.) Language documentation and description, Vol. 1, 35-51. London: SOAS.
A useful overview of language documentation can be found at the HRELP What is language documentation? page, and the resources at their 'Online resources for endangered languages' page are also helpful.