Dont make babys room too warm. If its uncomfortable for you, its uncomfortable for your baby. And keep babys room smoke-free, since exposure to passive smoke is also believed to be a risk factor for SIDS.
Finally, if you are worried because your baby has started to roll over onto his or her belly during the night, this is actually good news. By the time your baby is old enough to roll over, the chances of getting SIDS are greatly reduced.
Hopefully tips like this will position you in good standing and allow you and your baby to get back to sleep.