Again, ditto what Jim said about the secondary bevel, or "bezel" as it is sometimes called. A good paring chisel will have a primary bevel and a very slight, secondary bevel right at the tip. The angle of the primary bevel is whatever feels best to you, though it is usually between 20-25*. You can grind this one on a grinding wheel (8" is better than 6") and don't worry about getting it perfectly flat. A slight concave is okay.
When you place the chisel on your sharpening stone, or whatever flat surface you use, let it rest on the primary bevel. Then, as Jim said, tilt it up on its leading edge just a few more degrees, and begin the sharpening process. Personally, I use sandpaper on a granite block, and rather than moving the chisel forward and backward, I work it from side to side. I've just found this is more comfortable for me and I like the results. There are multiple ways to sharpen a chisel, and the best way is whichever one you feel most comfortable with.
Bill