I have had pretty good success (and some random failures) with this design. Alas I can not find a reference to it online, and more than likely the name I have for it is incorrect. I found the design when I was a younger child, the design was in a book of paper plane designs.
The design is fairly simple though:
The result will be a traditional dart with a tiered nose, which will fly a bit more stabler than a traditional dart. You may need to gently tweak the trailing edge of the wings to create a bit more upward direction (lift is probably the wrong word). You can also play with the positioning of the creases made in the additional step to adjust the balance, which will probably achieve the same results as the wing tweaking.
The following SVG should give you a hint: http://pastebin.com/PnsaGPzK
Kevin Lacy, chief traffic engineer for the state DOT, and the one who filed a complaint with the N.C. Board of Examiners for Engineers and Surveyors, protested that in trying to have Computer Scientist David Cox investigated for his detailed complaint about a traffic intersection while not licensed as a professional engineer, "I'm not trying to hush him up."
It does my head in.
Anything that increases choice is a good thing.
Be careful when a loop exits to the same place from side and bottom.