Place the garment on the ironing board, smoothening out as many wrinkle as possible

Yes, that's the right way to iron clothes. If you are ironing sensitive materials, then don't forget to adjust the setting/ mode to that material to adjust the heat flow. Some sensitive materials include - Nylon, Rayon, Silk etc. You can also sprinkle some water on the clothes at the time of ironing, so that it takes less time and you get a better output.