The secret to keeping your clothes looking crisp and new is ironing them well. When your blouses are ironed and pressed, they look more expensive. Ironing your clothes well gives you a more professional image
Look at the tag in the blouse to see what material it's made of. Set the iron temperature for that material. (If the iron is too hot, it can damage the fabric.) When the little light turns off, the iron is hot enough to iron
Undo all buttons. Lay the collar out flat, and iron it first. (If you save the collar for last, the rest of the blouse may get wrinkled again when you iron the collar.)
Next iron the sleeves. Fold out the cuffs and press them well. Then do the rest of the sleeve. (Repeat on the other sleeve.)
Iron the body of the blouse by laying the front half of the blouse on top of the ironing board. Iron it well, and then work the blouse around the ironing board - turn it so that a portion of the back is on top and iron that. Then turn it again and iron the next portion, until you come all the way around to the front again. (Don't lay out the blouse folded and try to iron through two layers of fabric.)
Buttons - don't iron on top of the buttons, as that can damage them. Press the iron in between the buttons