Peanut: soak half (3oz unsalted peanut) in water 2 hours before hand.
Dried bean curd stick: soak for about 30 minutes.
Tofu: wash and cut to 1 inch cubes, let air dry on strainer/racks for 15 minutes.
Sweet potato: thick french-fry cut.
Pumpkin and taro: wash, remove skin, seed(pumpkin) and cut into small 1/2 -1 inch chunks.
Carrot: wash, remove skin, flower cut or simply cut into 1/4 " chunks.
Zucchini: wash, thickly slice.
Green bean: wash, peel off sides, cut into 2" length.
Mushroom: if you're using porta bella or shiitake, wash and slice them. If enoki and straw are available, then cut off their heads and wash.
Cilantro: finely mince.
Scallion: finely chop.
Tofu skin leaf: cut into 3"x2" strips