So I had the issue of getting tons of emails which most of them being not important with the a few important ones mixed in. I always found myself checking my phone every time an email came in because I was worried it was something important.
So I decided to create an application to solve this problem for me. It is called Labelert. You are able to apply labels in Gmail to incoming emails. Labelert reads these labels and changes your phone's LED color depending on which label gets applied.
There are 5 colors to choose from.
Check it out at Labelert.com
Don't forget you can try it out for free for 24 hours.
Hope this helps some people out.