1. Shoot the crap out of everything
2. Beat the crap of anything left standing
Disregard all the fancy, highfalutin jargon about maintaining the initiative, movement blocking and other such goodies, those are only the tools by which I achieve the two basic objectives. Similarly, mech lists use Rhino rushes, vehicle bunkers, etc. to perform the same two tasks.
Dealing with Night Fighting can be a problem with a lot of 48" range units. Simply running up closer and engaging at shorter ranges isn't the best option, especially for my Speeders since that would deny me my range advantage, although since S4 weaponry can already glance AV10, the Gauss auto glance isn't such a big deal, but I do depend on a turn or three of prep fire to soften up and stress my opponent's army to set him up for the endgame.
Against the Necrons using Night Fighting, I lose that chance. Other lists might be different, but for the one I'm currently running or the simple variations I'm running off of it, this can be a slightly scary prospect. Right now the only idea I have is to edge my Speeders forward to just over 24" and march my Terminators right into their faces. I can shoot them down more effectively at shorter ranges and getting into CC with even a big squad of Necrons is winnable. The issue is just if I can do it enough to break some of their units and chase them off the board.