Not that I'm any good at 960, but one thing I heard that sounded good was to figure out where your pieces are going to go first (including where you are going to castle). Then use your pawn moves to support that plan.
Not bad at chess... useless at 960. Need Guidelines

I don't really know as I have played 30 or something 960 games in my life but here are my impressions:
a) Many of the standard opening advice is applicable to 960 - focus on the center, develop minors before majors, create open lines for your pieces, get your king out of the center usually.
b) 960 can create serious weak squares on your second rank. In regular chess, your f2/f7 pawn is defended only by your king. In 960 chess you can have pawns defended by nothing. Before you make any plan in 960 figure out where the second rank weaknesses are and think about defending those and attacking those weaknesses in your opponent.
c) Sometimes choices get made for you. If you start the game with a rook on h1 and d1 you are going to castle kingside with high likelihood. Include that in your plans.
I find that the positions that lend themselves to a closed positional game is easier for me by far with 960. Any of the games that have two weak squares to defend are almost impossible to manage if you yourself don't quickly mobilize an attack of your own. I find that people who are good at exploiting weak squares and using two or more minor pieces, in a well coordinated attack give me fits also, much more than in standard. Part of the problem I have with 960 is, I tend to make one move attacks, just to probingly see what my opponent responds with. A good standard opening has a multitude of facets to its over all attack. You almost need to come up with what would be considered the book opening for that position(if it were standard) to be really good at 960. It can be really tough to do that from raw calculation.


A friend of mine here, beat me in 4 moves by moving his lone knight 4 times and then forking my king and queen. My king was blocked on every side. I didn't see it coming or even consider his lone knight a serious threat. I normally never worry about my opponent's first few moves as a serious threat, partly due to the style I play but also because, the standard setup is more balanced in defensive strength and ability to stave off sudden threats.
I was too busy trying to strategize an attack and tactical chances. I am sure he did that by study and also seeing what he could do to manipulate me as Alekhine did with his opening. I had been avoiding his attempts to draw out my pawns,while attacking the knight,that would have helped to take away my kings defenses. This lent to me being lulled into allowing that to happen to me. Making threats that have a good counter in store after your opponents retort is the key in chess, but it seems compunded in 960 with certain positions.
I fall apart in the first few moves in 960. I suspect that I am losing the moment I move a piece. If I survive the opening I can give a good account of myself.
Maybe I am more reliant on opening theory than I know. I also suspect the strongest part of my game is late-middle/end-game positions or closed games where there is a nice balance between tactics and long-term strategic goals. I don't handle and try to avoid situations where there is a large branching ratio - my instincts fail me.
How should I approach opening a chess960 game???