http://fun.kyti.me/index.php/2012/10/funky-ombre-pumpkins/
http://www.teenvogue.com/fashion/fall-trends/2011-10/fashion-inspired-halloween
http://www.marthastewart.com/274730/halloween-crafts/@center/276965/halloween
http://www.polyvore.com/halloween_makeup/set?id=60436175
http://www.polyvore.com/just_some_helpful_halloween_tips/collection?id=1943239
Also if you are stuck for costumes, dont just think about scary things you could go as your favourite celebrity, model or designer. Take inspiration from things like Instagram and Pinterest.
If you don't want to be a celebrity, you can copy their Halloween costumes have a look at Kim Kardashian's mermaid costume or on this link -http://fashion.telegraph.co.uk/galleries/TMG8851001/Celebrity-Halloween-costumes-in-pictures.html