There are certainly millions of sites for different purposes. If you know some good ones, please let me know.
MACA - the main source for MA chess player. List of future events, news, ratings, coaches, camps and classes - all this is on MACA site.
For some misterical reason not all tournaments are listed on MACA calendar, some of them you can find only on New England Clearinghouse
Our neighbours - RI Chess Accosiation, also runs a lot of tournaments.
Main US site USCF is very useful: you can lookup player, tournament, affiliate, etc. Your own USCF page should be always in your bookmarks.
Some local clubs:
Boylston Chess Club. The oldest in US, yes, this is real CHESS CLUB - with all chess tables and pictures of world champions on the wall. It runs tournaments every day.
the great site isICC, non-stop tournaments, simuls, millions of puzzles, easy to find an opponent with your choice of time control and rating level. Yes, you have to pay $70 per year - $35 for kid's membership (free for Grandmasters, so ICC have them all!) - but it definitely worth it.
For kids: you can practice simple endgames, like KQ vs K, KR vs K - excellent educational tool to practice checkmating your opponent. For higher level players you can practive KBN vs K and KQ vs KR, which not all Grandmasters converted to win!
If you don't want to pay, there are many free sites, for example chess.com
40000 puzzles for all levels. You don't have to pay, free account is very good.
To watch live all major world tournaments with chess engine go to chess bomb!
Chess news sites IN RUSSIAN:
e3e5. If you think that e3-e5 move is impossible, then - you are right! :) It should read as 1.e2-e3 e7-e5 :)
Chess News - excellent journalist job. Among the authors is Genna Sosonko! English version is here.