I feel like I've been cheating with how lucky I've gotten this year.
If Marshall gets 12 points in a 1 point PPR league this year, I'll be 4-0 this week and 14-2 for the year, with both losses coming in league C.  In the other 3 leagues, I'm near the bottom in points against, but I haven't been totally undeserving of the wins because I'm near the top in points scored as well.
My money league has been fantastic, though.  Heading into the monday night games, my 400 points is by far the most in the league, and that's 
with leaving Dwayne Bowe on the bench weeks 2/4 (another 40 points right there, will never bench him again).  The next closest team is 60 points behind me, an average of 15/game.  So far it's making up for last season, when I lost Jennings, AP and Forte on the way to the playoffs and started out something like 2-3 despite leading the league in points.
In my opinion, the single most important thing about a fantasy team is consistency.  I modeled my money team around players who 
consistently performed well by drafting Brees, Sproles, White, Harvin, and Bowe.  The only real exception to this strategy was taking a risk on Jamaal Charles, a pick I was exceptionally unhappy even during the draft.
A consistent team will beat an explosive team a majority of the time.  If you choose a bunch of boom or bust players, like Vick, Cruz, CJ0k, etc, you have the potential to score a lot of points.  However, a majority of your team will have to overperform in order for you to get an above average score.  I generally don't listen to "fantasy experts," but Matthew Berry has the right idea about several things.  In one article before the season, he highlighted that consistent average teams are 
more likely to win than boom-or-bust teams.
For example, here are my top four players from my smogon auction league team that are the reason that I am soon to be 4-0:
Matt Ryan:  32.46/18.66/22.40/26.76
Percy Harvin:  16.92/21.82/17.26/15.10
Marshawn Lynch:  10.70/19.20/10.40/24.50
Jimmy Graham:  17.50/16.60/9.60/11.10
Combined:  77.58/76.28/59.66/77.46
That's pretty fucking consistent!
On that note, justin in the auction league for unluckiest team of the year.  125+ points every week, but he's lost two games 148-156 and 154-155.  He's scored one of the only 4 games above 150 points so far this season, but played two and lost to them both.  Ouch.