First you must get a hold of an iron and an ironing board. An ironing board is optimal but if you cannot find one use any hard flat platform with a towel placed over it i.e. your kitchen table with your dry shower towel placed over it.
I would recommend purchasing or using a better quality iron as there is a smaller chance of ruining your shirt. It is also good to clean your iron before ironing your shirt, as any dirt on your iron can leave stains on your shirt.Make sure your iron is set to the right temperature for the material you are about to iron. You can check the material from which your shirt is made on the tag inside.
Start your ironing from the shoulders. Place one shoulder on the point of the ironing board and run your iron over it until it is flat. Repeat this with the other shoulder.
The next areas to cover are your sleeves. The key is to set up your shirt perfectly flat from the top of the sleeve to the bottom before even picking up your iron. Once your sleeve is perfectly flat and there are no overlapping pieces of material or folds, run your iron over it once smoothly. At this stage you can decide whether you want a strong crease on the top of your sleeve, and this is entirely up to you.
Iron over the cuffs making sure not to make a crease on these and not to iron over the buttons. Repeat this on the other side of the same sleeve. Then move on to the other sleeve.
Next you will iron the left side of the front of your shirt, the side without buttons. Once again place the entire portion of the shirt flat on the ironing board and iron over it only once. Now do the same for the back of the shirt, which will need to be done in two stages due to its size.
Finally iron the front right side of your shirt, taking care to iron between the buttons not over them.
Then flip your collar out and iron from the inside to make it flat. Note that with each portion you iron, give 10-30 seconds for the area to cool down, as the shirt will keep the shape in which it cools. i.e. If you are too hasty in moving from one sleeve to the other, the sleeve you allow to drop on the floor while ironing the next portion of the shirt will cool in a folded shape, and will keep these creases and folds.
Taking out creases
Strong creases can be taken out by pouring a little water directly over them and ironing immediately after. You can pour water from a glass but be careful that the water is pure and clean, as well as the iron; otherwise you run the risk of leaving stains on your shirt.
A simple way to avoid this is to use an iron with a in-built spray function. Pressing a button on top of the iron sprays the already heated water directly onto your shirt. Spray in a straight line and cover the whole crease, running your iron over it immediately after.
To take out smaller creases, run your iron over them several times. If you have a good quality iron, use the steam function. This function allows the cloud of hot steam to exit the iron from underneath, effectively soaking the shirt underneath with hot steam and flattening it with the flat bottom of the iron.
The last and final stage of the ironing your shirt is to check for any easily identifiable mistakes you made or portions of the shirt you overlooked. Once these are fixed place your shirt on a coat hanger and allow it to cool.
The best way to save time, money and energy is to have a clean, quality iron. Ironing your shirts immediately after the cycle on your washing machine has finished is also recommended. This way your shirts will still be damp and you can quickly iron them without worries of leaving creases or stains.