boah!... what are you all doing difficult!!!
I always import the pic into photoshop and convert it to greyscale. Then I print it out on A4 paper.
After printing I cut out the less important parts at the borders untill I have a square left.
Then comes the fun part: I browse the internet for origami pages and search for a nice model. Sometimes I am in a "lotus flower" mood and sometimes in an "african elephant" mood for example.
And then I start doing origami with the featured pic while looking how the light of the candles around me influences it.
And then suddenly.. *PLOP* .. I know what to do with it. Its that simple! Try it!
Oh.. one tip... If it doesn't work out then try printing out in color or use a scented candle... that really can help when it doesn't do *plop*.
Good luck!
