Same boring point I know, but the only chance we have of getting a better atmosphere is if the various groups in the North decide to sing together. It's an unusually small home end, so it's crucial that those who attend sing the same songs. Then you'll get other parts of the ground joining in.
Quite often you see posts on here saying stuff like "the atmosphere was good where I was, we were singing all game" but the truth is we can't always hear you because your clique is smaller than you may realise.
Another boring point: the kids, oldies and casual fans that sit in the East, West and South aren't likely to join in some of the more "ambitious" chants, or the anti-Palace or sweary stuff, so if you want the whole ground rocking it does have to come back to the simpler, more predictable chants - Seagulls, Albion, We Are Brighton etc etc. Some fans seem to think that stuff is beneath them.