When they are small I always made sure there was a difference between bed time and daytime naps. Have a bedtime routine, bath story cuddles and sleep. I always let them go to sleep without being cuddled off. Give lots of cuddles but not hold them till they fall asleep, that way if they wake in the night they are more able to go back to sleep without having to be cuddled off to sleep. Also night time for sleep, i.e.if they wake dont start playing with them, dont take them out of their bedroom, keep your voice soft and conversation to a minimum. As soon as they are old enough dont give drinks if they wake up and learn to be firm. Give minimum comfort, nappy change or whatever, say goodnight and leave the room. Leave for 5 minutes and repeat process until they realise there is nothing to wake up for and nothing exciting if they do wake up. I know this sounds harsh but it doesnt mean you cant give plenty of cuddles and fun during the day when it is appropriate. I have three kids aged 13,10 and 7 and this process worked for me. Hope it helps, PS Dont ever take them into your bed as a quick fix solution coz this causes lots of problems with sleeping on their own in the long term.