All the above advice is good
For me I just use plain white bread.
For berley there is no need to go to the effort with fine bread crumbs in my opinion,
Just mash it up in a bucket of water that you're fishing in to the consistency of sloppy porridge
The first post is the perfect presentation, I catch all my mullet this way
For mullet I use number 10 and 12 blackie hooks
Bream I use number 6 baitholders. I find any bigger and they mouth it - any smaller and..
while I've caught them on 12's it's advisable to go bigger (but not too big) as you can use bigger bait, catch bigger bream
My biggest bream (up to 40cm) have come from white bread fished this way and it's a universal method,
tends to work better in dirtier water rather than clean sea water