It is pretty much a factual request…
I need a straightforward and hopefully easily reproduced sign, seal, glyph, talisman, veve, hex sign, or possibly sigil to bind a dark force and keep it the hell out of one’s face.
I cannot believe, with all my books both analog and digital, and with the entire intarwebs at my feet, that I can’t find one; my google-fu must be, er … at a low ebb.
Uh, need answer fast. Y’know. Cause of the evil and stuff.
How 'bout an Elder Sign?
Wear a fascinus. Wear a lot of them, biggest you can find, wear them everywhere, can’t be too careful.
Can’t go wrong with a good, old-time Seal of Solomon.
Have a look here, second one down.
Ah! Excellent suggestions all three; the Seal of Solomon is probably most like what I had in mind, because the dark force in question is far too annoying to be connected with Cthulhu on the one hand, and needs to be contained at the source more than deflected from my person, on the other.
Believe it or not, evil entities, when faced with a strong person who is difficult to attack directly, can become unbelievably petty and passive-aggressive. And there is nothing that will blow your good mood like passive-aggressive evil!
Thanks, O erudite brethren and sistren.
Shouldn’t a Seal of Solomon include a six-pointed star?
Khadaji! That’s the one I was trying to find! But I only could remember the similar one for “Victory.” (Like Bjork’s tattoo.)
Ask Beni, he has a collection.
Apparently not, but I do notice that it includes the command keysymbol from a Mac keyboard.
Tell it it looks funny and has bad fashion sense.
It looks like you need this sign.
Damn you!
I clicked and then chortled here in the office and drew attention to myself!
The OP asked for a simple glyph. 
That Seal of Solomon is pretty damn “busy” – they could’ve used a good logo consultant back then. 
From a picture caption in the article:
Yep, that’s exactly what is is all right.
Yet somehow it explains nothing.
The evil eye is obviously into bukkake.
Hamsas are nice and simple and recognizable but effective. I’ve got one in my apt.
Nazars are pretty cool too.
I think they should get the job done.
Who knew, but you are in search of some apotropaic magic. Follow links to amulets, etc.
That is certainly efficacious… as far as it goes.
But for real evil you need one of these:
Solomon’s Seal
I tried to find a link to the very rare “Walrus of Solomon” but apparently the Illuminati have removed all traces of this. One of its most useful powers is FNORDFNORDFNORD so that may be what you really need.
A+ 
