Yes for me, whenever I need to sneeze I look towards the sun (not directly at it of course), or at a light in the house, and it works. I don't understand why but apparently this is true for about 20% of the population. Does it work for you?
But when I used to take the bus home (I drive now), every single time I'd walk outside and it would be sunny, if I happened to get a blast of sunlight in my face, I'd have to sneeze.
I find that sticking things in my nose makes me sneeze. ( Like the end of an unsharpened pencil.. if you scratch that plate thing with it you will have to sneeze )