Go through the other party's affidavit and look for anything that hints the other parent can't co-parent.
If there is anything in the other party's affidavit attacking you as a parent, attempt to prove it is not true.
Sometimes there's little need to cross-examine.
Really does depend on the contents of the affidavits.
And when you get down, call a friend/help line, and it's OK to have a cry.
Custody is often the worst ever experience for a caring parent to go through, so it is normal to feel down. Just remember the kids are worth fighting for, so take time out, feel bad for a bit, then pull yourself together again. Most times the pieces come back together OK