The pink noise generator works wonders. I grew up without air conditioning and in the summer we used window fans. I still like to do that sometimes and I noticed that the drone of the fan really helps me sleep. I bought my clock radio without noticing that it had a pink noise generator. I just wanted the ceiling clock projector. I pushed the rainstorm button for the heck of it and it really helped me get to sleep.
This is the one I have:
Amazon.com: Homedics SS-4500 SoundSpa Classic Clock Radio