also, forgot to say, (not sure if you already do this, but) maybe you could introduce new things (rituals) like for example, before putting down for a nap, go through the same thing each time, for me it is lullaby cd on in her room, draw the curtains, lay her down on lambswool and then into sleeping bag, cuddle with mum, dummy, then into cot... so even though you may be mixing up the day a bit, some things are the same and might give bubs security with knowing what comes next (although my DD cries each time put in the cot so not working so great for us!)...