Do not dry clean often. Recommended dry cleaning is 4 times per year.
Do not soak
Do not tumble dry under any circumstance
Do not bleach
If there is a small stain on use a clean damp cloth and gently blot to remove the stain
Do not iron. If you need to press your suit (and the creases haven’t come out after allowing to hang up for 24 hours) place your iron on wool setting and use the steam to remove wrinkles. Never place the iron on the fabric.
When not wearing your jacket give it some time to "air out" by hanging it on your suit hanger. This will allow for the moisture that has been trapped in to evaporate and let the wrinkles come out of them and get rid of most odours.
Hang the suit jacket on the wide jacket hanger. Do not use cheap plastic hangers as they can warp the shoulder pads. Instead find hangers that are built with the same shape as a human shoulder. It is also best to opt for hangers that have roughly the same size as your own shoulders.
Brush your jacket regularly with a fabric brush. This will keep the jacket looking clean and crisp. Regular brushing will also help keep the fibres of the fabric from breaking and remove and dust.