Help! Nearly 12 week old DS just cannot settle himself to sleep in the evening. During the day he usually has 2-3 naps - either he drops off after a feed or in his pram while we're out (the naps can range from 20 mins up to about 3 hours) but in the evenings he gets cranky and overtired but just won't sleep. I've tried feeding him to sleep in a darkened room and rocking him but he generally cries and grizzles until about 10.30/11pm when he finally nods off. Once asleep he will get up for a feed every 2-3 hours but has no problem drifting off afterwards. It's just the initial getting himself to sleep that's a killer and means we don't get an evening. Any tips on how to help him settle?