mailing list for local conferences
There is a wiki devoted to call for papers (http://www.wikicfp.com/cfp/).

Googling can help you find earlier editions of conferences and so forth. Make a list of the ones relevant for you and when they occur – each edition of a conference will occur at the same time of year. Keep this list on your wall, perhaps sorted by month of conference (or better, month of deadline). Google will help find the current edition.