Styles taken from decora:
1. Lots of accessories! Mainly rings, hair clips, hats, and bows
2. Lots of colors!
3. Customization of accessories and other stuff you own!
Styles taken from sweet lolita:
1: Focus on more princess-like things! Stuff like cupcakes, ice cream, and other desserts, stuffed animals, and pearls
2: Pastel colors! Sort of the same palette fairy kei uses
3: Basic coordination of a lolita outfit! Bell-shaped skirt, petticoats, mary jane shoes, stockings, and a cute hairstyle. X3
Craft Tutorials:
Deco Cream Ring
Deco Cupcake Paperweight
http://www.youtube.com/user/kawaiisupply - She has lots of cute deco lolita craft videos! Check them out!
Hair Bow
Example of some cupcake rings:
http://shiawase-chan.deviantart.com/art/Deco-Lolita-Cupcake-Rings-134770554
You can also find lots more tutorials on Youtube and elsewhere by searching for a few basic terms like deco, deco lolita, and kawaii.
Stores:
http://www.jbox.com/category/402 - JBOX's listing for their paper clay products! They have molds, kits, tools, and pre-colored paper clay. I like paper clay because it air drys and you don't have to worry about baking it!
http://www.yukiumi.com/en/#; - A website that has many decoration (AKA deco) items for sale! Just click on the 'deco den' link on the left side. [I've noticed some confusion on Youtube about what 'deco den' stands for. To my knowledge it just means a den where you decorate stuff. XP This also applies to a store or part of a store that sells deco supplies. I'm not really sure why people call their crafts 'deco den'... -_-;;;]
http://www.sweetrococo.com/ - This website lets you design your own custom lolita outfit! They have lots of different fabrics and trimmings to help you create the perfect deco (or any other style) lolita outfit!
http://www.amphigory.com/wigs.html - Can't forget about your wig! XD The deco lolita style is a bit more free with the color of your hair, and I've seen many that use pastel pinks, blues, greens, and purples for their wig color!
FYI!!! Don't confuse deco lolita with hime gal fashion! Hime gal is a type of 'princess' fashion, and does (vaguely) resemble lolita so they are sometimes confused. Hime gal fashion and accessories often look like they have been 'blinged' up, and often have lots of pearls, crystals, diamonds, and other precious gems included in the look. Since the supplies for deco lolita and hime gal crafts are often included in the same store or website, many people just label them all as deco or deco den crafts.