A couple of great tips for styling a pixie haircut with long bangs would be to kind of experiment a little bit with the direction of the bang. One thing that looks really cool sometimes, depending on how long your bangs are obviously, usually we just wear a long pixie with a bang swept over to one side. A really cute look would be like a pompadour style, so round brush the hair back away from the face and let it all stack on top of each other. That's a really fun way to play around with your pixie cut, experiment with the bangs like that. I would definitely recommend using some sort of a texturizing spray to get to hold and stay up as high as you want. I also would tell you not to be afraid to tease a little bit of the root to get it to stay where you want it. So that's a really great way.
Another great thing to do sometimes if your hair will accommodate it, is a sleek slicked back look. I think that there is something to be said for being able to pull those bangs off of your face, so either a slick back look or even french braiding the front or giving a little twist the the front is nice. I'd also play around with texture. If you have a long enough bang try throwing a little away for a little kick in it. See if you can get a little bit more motion out of it instead of keeping it so straight and sleek. Those are some great tips on how to style a pixie cut with long bands.