8 month old baby with sleep problems?

Try getting a sound machine. I used one for years that I keep on white noise. My youngest son is now used to it since he sleeps in our room. It helps him sleep longer and he is conditioned to it. When he hears it he knows it means sleepy time. You can get a kids one by Homedics, it doesn't do white noise but has nature sounds and also has a built in projector that shines pictures of fish and animals on the ceiling. My toddlers love it. My son is nearly one and sill sometimes goes through periods of waking during the night. Try giving him a special blanket or toy to cuddle.