Q_Links: The Sandwich
Although straight text, this site provides a good rundown on batting.
Quilt Batting is the middle of your “quilt sandwich”. It is also known as quilt padding or quilt wadding. Batting is the insulating layer that provides warmth, along with dimension or thickness. In my “quilt batting tutorial” I hope you learn a little more about batting and the types of batting available, along with a little bit of history about quilts.  Click link to read more.
http://battylady.com/batting_information.ph
Chart to Calculate yardage for backing.
A very handy chart to find how much backing fabric to buy.  Also has links to quilting tools, binding methods, and cutting bias strips.
http://www.carriagehousequiltshop.com/category.php?category_id=259
All about a product useful in spray pasting the sandwich. 
Stricly commercial, but good information.  Is all about spray basting the sandwich, but also includes spray basting during freezer paper applique, Celtic applique, embroidery and as a subtitute for quilting.  Click on the link below.
http://www.sprayandfix.com/howto.html#basting
Strictly commercial, however, informative in a specialized way.  Our thought--can't hurt.
A "FatBack"® is a Queen-sized Quilt Back. Each pre-cut quilt back is 108" wide and 117" long (three and one-quarter yards). The 100% cotton backings are priced at the three yard cost.  Click link to read more.
http://www.christianlanequilters.com/widebackings.html
Has to do with making the sandwich, quilting and binding.  Loaded with content with a plethora of photos.
Southern California quilt instructor Billie Lauder joins Alex Anderson to demonstrate how to finish and sign quilts.
http://www.hgtv.com/decorating/tips-on-finishing-a-quilt/index.html
This blog has a lot of interesting and unusual content with good diagrams, however to uncover it you must follow the internal links
Start with a length of fabric, twice the required length of the backing.  Fold in 1/2, right sides together so that it is now the required length. Pin and sew a seam down both sides of the selvedge edges, making the seams sufficiently wide to allow the removal of the selvedge. (You can also do this with 2 separate pieces of fabric placed right sides together).  Click on the link to read more.
http://www.alwaysquilting.com.au/making-a-quilt-back.htm#Join_Fabric
Shows how to sew small pieces of batting together in text and graphics.
A quilter in a discussion group asked what to do with small pieces of batting, and she expressed concern about wasting batting when her quilt was smaller than the batting, and she had pieces of batting left over.  This happens to every one of us. Click the link to read more.
http://www.ehow.com/how_2135470_pieces-batting-together-bigger-piece.html
Quiltwithdonna.com is the host of this project.  Click HERE to go to the host website.  You will love it.
One quilter's method of making the sandwich with photos.
Let’s talk about finishing those quilts. Once the quilt top is pieced, it’s time to make a quilt sandwich. Traditionally, a finished quilt consists of three layers. 1) the quilt top, 2) batting, and 3) a backing fabric. That’s not always the case, but generally this is how quilts are finished. Some exceptions may include:
http://bloominworkshop.wordpress.com/2008/02/18/a-quilt-sandwich/
Here's a little picture tutorial of layering and preparing a quilt sandwich for quilting. Very commercial, but forth a read.
Not all of us have large quilting frames with professional quilting machines, so we still have to do it this way.
http://sewfunquilts-sewmeow.blogspot.com/2011/05/easy-peasy-layering-quilt-sandwich.html