You can get some creative costume ideas at http://costumeideazone.com/. You can also get some ideas at http://www.indigo.org/halloween/page2.html
You can get great ideas for making scary customes at your local Michaels store or Party City. You can also go to the following websites such as familycrafts.com or www.costumepatterns.net
Well if you like pranks, get a scary costume (doesn't matter what it is) Have a friend to stay over for the night of Halloween and watch a scary movie. Have another person to wear the costume while you two are watching the movie. Tell your friend that you need something from the closet, the person openes the door and the person with the scary costume will scare the person. Simple as that.
Just wear nothing and put on a mask.
Lady Gaga
This website: http://www.parents.com/holiday/halloween/costumes/ has some fun and unique costume ideas for your new born. But remember to dress them in a warm costume.
I would recommend anything within the vampire or zombie theme as a scary costume. If you would like to be entirely original, you may want to be a character out of a Stephen King novel or an Edgar Allan Poe story. If all else fails, you can look to online Halloween costume stores for good ideas.
Scary halloween costume is always a ghost like costume with scary makeup on face.You can put long nails and keep shabby hairstyle with scary objects like axe or knife.You can put some red color on your clothes and face to look more scary.I saw some best scary costumes on below pages.http://www.spicylegs.com/c-59-non-sexy-scary-adult-costumes-women.aspx?pagesize=40http://www.coolest-homemade-costumes.com/scary-halloween-costume.htmlhttp://
JoAnn's craft store.
Like Ghost Rider
If you are looking for unique costume ideas, you can find them at http://www.essortment.com/halloween-costume-ideas-50-unique-weird-ideas-52253.html. You can also find unique decorating ideas at http://www.halloween-website.com/decorating.htm
You can find unique Halloween costume from website such as costumeideazone.com; costumeideazone.com/CIZ/CostumesByCategories.aspx?c=9; www.halloweencostumeideas.com