Recently I've started tying this range of flies, originally designed by American dresser Bob Nauheim to imitate Silver Minnows when fishing for Tarpon. There are several versions on it and mine doesn't stick to closely to the original but it works better in local waters. The idea of the Crazy Charlie, like the Clouser fly, is to be top heavy so that it sinks and retrieves upside down (hook up). This combined with the fly's wings helps to keep this fly pattern fairly weed/snag free.
I tie it on a Kamasan B984 #4 hook which is a fairly wide gape hook and can handle even quite large Pollack and Bass. I cover the hook from just behind the eye along the shank to where the hook starts bending, adding a few layers to increase the shank's thickness.
About a third of the way from the eye to the bend whip in a pair of dumbbell eyes (or chain eyes) on top of the hook - this is the weight which causes the fly to retrieve 'hook-up'. At this point I usually put a small blob of superglue on the eyes to keep them firmly in place. (P.S. The only reason I'm using red thread is to show it up well against the hook as I normally use a translucent thread)
Next job is to tie in a sparse amount of white bucktail along the top of the hook, again stopping with the whipping at the bend of the hook. The original Crazy Charlie used Silver Flashabou for the tail but I'm tying this particular fly for coloured water and weedy conditions where I've found white bucktail works best.
Between the eyes and the bend now wrap the body of the fly, over the tied-in bucktail, with silver tinsel carefully wrapping alway to the tail then back to the eyes where the tinsel is tied in and trimmed off. At this stage I like to coat the tinsel in a thin coat of head varnish as it gives the fly a longer life and a bit of protection from a charging Bass.
Now turn your fly over (much easier if you buy a rotating vice). All your tying now will be between the dumbbell eyes and the eye of the hook. Add some flash to give the fly a bit of a sparkle along what would be the median line and tie in firmly.
Next job is to tie in the 'wing', in this case yellow bucktail and build up a tapered head behind the eye of the hook. Whip finish, apply head varnish, and give the eyes some life.
The almost finished fly. I've used red nail varnish to colour the eyes and tomorrow when completely dry I'll add a blob of black in the eyes to make them look more lifelike. The reason for the red colour rather than white is to give attacking fish a 'hotspot' to strike at. Maybe I'm wasting my time but I think it increases my catch rate 
P.S. Yes, I know it looks like a Clouser but that's because I haven't trimmed the tail, etc to length yet 
