Mmmm, tricks of the trade hey? Well it definitely is alot easier when everyone is doing the same thing to begin with - so I have a bit of an advantage there!
I think the key is routine, same time everyday, we do the same thing, children eat, have nappies changed/checked/toileting - the room is darkened, relaxing quiet music put on, staff go into super calm mode - no loud conversations, calm quiet demeanour.
We pat about half of the younger children to sleep, back pats or rubs are great, also the old eye brow stroke works wonders. The older children have usually learned to sleep on their own by the time they move up to the older groups. The routine remains the same for all the ages though.

My suggestions, set up a routine, do the same thing every day (especially while establishing the pattern), put away toys and distractions - maybe you might like to read a short book every day as a part of the routine. Darken your child's room, put on some relaxing music. Pat, stroke, rub to calm and soothe. Be firm, let your child know that it is rest time not play time, don't give in and hopefully you will have success!

I would say any sleep, whether only 30 mins or an hour is better than none at all.