Neil Sullivan on...
The basic rules for - not just catching crosses, but everything - is having a good sound technique. Once you have that you learn from experience, playing games and knowing what is right for you at a particular time.
Unfortunately, it just comes from playing games and having bodies around you. Much of it is down to decision making and having a good starting position. If you've got a good technique it will sometimes get you away from making a bad decision.
Obviously clutching ball cleanly is a major asset in cross catching and this comes with working on your basic keeping. You'll often find that what is right me might not be right for someone else. If you work on a basic technique that is going to stand you in good stead, you are half way there.
When you start playing games you'll know what you can come for and what you can't.
Communication with the players in front of you is important and you need to be positive with your calling so your defenders get out of the way of you and protect you. If they hear you coming they might be able to block a centre-forward off - legally of course.
Sometimes though you have to change your mind in mid-flight. If you do come, get knocked and know that you're not quite going to get there, you must be prepared to punch. You can't think you are going to catch everything because it doesn't work out like that.
The balls come in at such a pace now with a lot of whip and bend, and if bodies get in the way you have to change your mind in that split second.