Where can I find a list of tournaments to participate in? Where should I look for a list of tournaments in which new players can participate? I know that many players want to play real matches, but don't know how and where.
Also provide list for online tournaments.
For US tournaments, I recommend checking the U.S. Chess Federation (USCF) website:

http://www.uschess.org/tlas/upcoming.php

For non-US tournaments, I would check the FIDE website:

http://www.fide.com/calendar/tournaments.html

http://www.fide.com/calendar.html