Well I was going to suggest the bath, but note you don't want that to be the routine. I use bath as part of routine most nights, but not all. But I always give a quick massage using creams or oils with relaxing qualities, and ever since doing that it seems to do the trick, although DS has always been pretty good at getting himself off to sleep.

The only other thing I do is wrap, and tuck his two teddies in to either side of his head in the hope that if his dummy falls out it wont get very far and he can suck it back in. Works most of the time.

Oh, and music. I play a few songs from the Putumayo Global Lullabies. Works a treat, and is also good because I find that if he is being really hard to settle, then putting that cd on signals that the game is over and I am serious and you will go to sleep damn it!!

I have never really had a routine like reading to him or anything, because it all seems to get him excited, not relaxed. So I just stick to the really calming stuff like massage and lullabies. And a big kiss.