A cheap iron is more likely to have problems, clog, or burn your clothes. Be sure the floor underneath is clean. If you don't have an ironing board put clean bath towels on a table top. If you are ironing more than one dress shirt or more than one item, have hangers and a place to hang the shirt while the other items are being ironed. A nearby chair or a door handle can do in a pinch. You will need the hand towel for ironing the sleeves. It is not absolutely required but it will make it much easier.

TL;DR in Chinese:
从准备一个干净、质量好的熨斗开始。 把熨衣板调整到自己腰部的高度，检查一下底下的地板是干燥没有水渍的。 准备好晾衣架。 准备一两条毛巾。