Oftentimes, noise comes in from open bedroom windows. I know closing them during summer nights can be a hard thing to do, but closing your bedroom windows and opening other windows will greatly reduce noise and allow you to sleep better. Another option could be to close all windows and turn on the air conditioner to eliminate outside noise.
You could also try purchasing a white noise machine that you can listen to to help you sleep peacefully. Most people prefer to hear soft sounds of waves, and this is a good start to help eliminate other noise and drone out other sounds that might prevent you from sleeping.
Next, you can also try turning on the television or radio and try going to sleep. Make a playlist of songs on your ipod or mp3 player and play it when you sleep. It’s a whole lot better listening to something you’re comfortable with, than trying to deal with that annoying noise outside.
Another method is to turn off all ticking clocks, if applicable. I know that this is very annoying. Instead, get a digital clock so that you won’t have to deal with any annoying ticks.
If you are a bit rich, you could try purchasing soundproof windows. This is a costly way to practically eliminate noise, but it will do the job. This can reduce noise levels by 75-95%. Soundproof windows will act as a sound barrier and eliminate your noise problem. More than 90% of all the exterior noise comes in through your doors and windows.
Although this method can be dangerous, you can try wearing soundproof ear plugs. Be sure that you have some type of vibrating alarm to help you wake up, and that your environment is totally safe.