Babywearing, what a wonderful and helpful tool for high needs children as well as the text book child. Most cultures keep their children on them until they reach 1 years old or walking age. This creates a great bond for child and parent and especially helps a nursing mama stay in tune with her child. It's also a great way to help daddies bond with their babies sooner. There are many different ways to wear your child, but remember, any babywearing is better then no babywearing.
Also check out www.babywearer.com

Pouches/Slings:

These are very simple pouches that hang on one shoulder. great for quick in and outs, newborns all the way up through toddlers. You can do front carry's, cradle carry's, hip carry's as well as back carry's with a good pouch. Very compact and can be kept in the diaper bag for emergencies. These are sized, so always measure twice to insure you get the best size for you.

Ring Sling:

Similar to pouches in that they are a one shoulder carry, but these have rings that adjust to fit mama and baby. You can do all the same carry's as with a pouch. sleeping baby productions has some great info on carry's, threading your sling and other trouble shooting.

Mei Tai's:

These are 2 shoulder carriers that have a body with 4 straps hanging off. the bottom 2 straps are shorter and are tied around the waist, the top 2 straps go over your shoulders and can be crossed over your back (or front) and tied under babies bum. You can wear baby on your front, hip or back. Kozy carrier has lots of wearing instructions.

Soft Structured Carriers (SCC):

These are similar to mai tai's except that they buckle instead of tie and typically have a more padded/structured waist band. These are great for older/heavier babies and for outings for quick back carry's. Some major name brands are: Beco, Ergo, Pikkilo, Caylx, Connecta, Patapum and AngelPack LX.

Wraps:

This is the most versatile carrier, but has a large learning curve with it. Used by most cultrues to tie their children on them either on the back, front or hip; in a one shoulder carry or 2. Wraps are long (varying in length from 2.8 meters to 6) pieces of fabric (typically a gauze or a woven material for older/heavier children and a jersey knit for younger) in which you wrap your child on you. There are lots of carry's and lots of variations in those carry's. Wearyourbaby.com has some great video's and resources for making your own wraps and how to wear them.