DJ8- This is a clear and informative diagram of the interior of a suit jacket. It is useful, because it tells me where to add horse hair, pat stitching, twill tape. etc.
I also reinforced the shoulder by adding bias cut hair canvas. Padstitched the lapels, taped the roll line (by hand) so that the lapels lie close to the body without gaping.
Classic Tailoring Techniques for Menswear: A Construction Guide by Roberto Cabrera http://www.amazon.com/dp/1628921706/ref=cm_sw_r_pi_dp_CrWcvb1E3A7BE
How to Take Measurements - Tea and a Sewing Machine
Tailoring How-To: The Pad Stitch & Prepping Collar Pieces | Best and Essential Sewing Tips, Tools, and Tricks for Beginners | Sewing Hacks | Learn How to Sew | Sewing Tutorials and Instruction | Simple Sewing Techniques
how to tailor a shirt for a perfect fit, crafts
#Sewing: Hand-stitched buttonholes, No.3 Tailored buttonhole with a corded edge
Sewing Tutorial Detailed tailoring techniques for jackets
DAVIDE TAUB: Tailoring and Cutting @ Gieves & Hawkes No. 1 Savile Row - 3 Piece Suit
Fantastic blog with tutorial for hand tailoring techniques