Below are the items I pack in my repair kit when doing long distance races. I also have a metal clew/tack/head board made up that can be bolted to a sail instead of trying to sew on new webbing and rings. You just sandwich the sail material and use a drill and drill bit to go through the thick corner of the sail and then bolt the thing on. Crude but effective. A bottle of rubbing alchol or acetone and some paper towel is a must to get the sail dry before attempting a repair.

• One pair stainless steel scissors
• One pair regular scissors as a backup
• One knife dedicated to sail repair
• Staple gun and staples
• Six awls to secure the sail while patching
• Two dozen pushpins
• One adjustable palm for hand-sewing sails
• Three seam rippers
• Selection of needles, size No. 14 and No. 15
• One roll prewaxed hand-sewing thread
• One roll of five-inch sticky back Dacron tape
• 10 feet of sticky back Dacron 54 inches wide
• Five rolls of double-stick tape
• Two cans of spray adhesive
• Three-quarter-inch tubular Nylon webbing
• Two-inch Nylon webbing
• Two stainless steel rings with bar
• 10 feet of Velcro
• Assorted pieces of Dacron and Nylon
• Spare set of battens – or at least 2 of the longest length you have store them if you have room in the boom
• Spare hanks
• Spare luff tape the length of your longest headsail
• Leech-line cord twice the length of your mast 
• Entire corner patch of one of your spinnakers
• Hot knife
• Nicopress tool and sleeves
• Hole cutter and assorted rings
• 20 feet of seizing wire
• 4200 large tubes with caulking gun – it will go off in water and creates a quick strong repair
• Sewing machine
• Spinnaker material the weight of your heaviest kite and a piece roll width and the length of our largest spinnaker foot.
• Sticky back aramid patch
• Spectra lashing