Need recommendation about earplugs for a good night sleep

Try the following:

http://sleepinpink.com/products-3000-big.htm

http://www.epinions.com/content_115939708548

http://www.travelcomfortable.com/eyemasks-earplugs.htm

http://www.travelproducts.com/store/sleep.htm

 (see at the bottom of the site)

I'm using OHROPAX and they are great. Very easy to use, comfortable and blocking background noises efficiently.

You can get them in almost and pharmacy in europe, but as far as I know they are not that wide spreaded in the US. If you live in the states you can get them through here.  

Howard Leight Max (NRR 33)-  they do the job.

You might want to try your local gun shop - no kidding.  They have these soft foam ones that fit in your ears and don't hurt when you sleep on your side.