Getting Nick to Sleep All Night - Take 2

OK, so last night was not a repeat of the night before. Nick went to bed around 8 and woke up around 1a.m.. I went in to check on him and do the every 10 minute thing and as I was leaving I saw Collin getting out of bed. I didn't hear any crying though. Nick went back to sleep but woke up again around 3a.m. I went to check on him again and Collin was back in bed. When Nick woke up again at 5a.m. I fed him and we both went back to bed until 7:30. We'll try again tonight and see how it goes. The doctor says by the end of the week he should be sleeping all night....