Snood knot for top hook
A couple of times the subject of knots for double rig hooks has come up. For the top hook, I use a snood that was shown to me by a guy at Compleat angler (I forget his name though :p).
This method allows you to place the hook exactly where you want, works on any hook with any type of eye, and is very strong to boot (practically 100% if you wet it and pull it slowly).
I've never found any exact pictures, so I thought I would do a little pictorial for those who want to try it out.
1. Lay the line parallel to the shank and loop it around as shown. To the left will be up the line and to the right will be the bottom hook you have allready tied on. Make sure you place the shank where you want to hook to be. Only have a small amount of tag sticking out. If you have a hook with a bent eye, you can pass the line through the eye.
2. Grab the top of the loop with your finger and thumb, pointing towards the hook. You'll keep your left hand on the tag, pointing down the line until you go to cinch the knot. Your right finger and thumb pins the shank, and two bits of line.
3. Make a loop around the shank (obviously your hand will still be holding the loop). Keep clear of the tag (i.e. it wraps around the tag as well). I'm only using my index finger to hold the loop there so I could take a photo. When tying the knot your right hand will keep the tension to hold it in place.
4. Make another loop. Be careful to cross over properly here as shown (if you dont do this right it could fail).
5. Keep making loops. Perhaps 7 or so (vary it according to your line size). You're hand will be holding the line to the left (you can see the straightened section where you would be holding it). Dont wrap them too tightly or the next step will be a little harder. When making loops, you point your thumb and finger down the line and move around the shank in a cranking pattern. Much easier than making a single loop, pinning it and so on as the pics appear to do (cant hold two spots of the line and camera though :p)
6. Make sure the loop is behind the tag (or the tag is over the loop). You can now pull the tag through, keeping your hand on the shank pinning the loops from unravelling. For this knot, you need to make sure you wet the line and pull slowly.