Reddit user fatrob says:
"Every day when you take off your suit, put the jacket on a hanger and place the trousers on the clamp-style hanger (the type that allows you to clamp the bottom and the whole pant hangs down with no fold). This will ensure that you never have to press your trousers between cleanings. Do not wear the garment for at least a day: it will allow for any creases to fall out on their own. Invest in a good umbrella and overcoat, keep your suit dry, you will not get the puckering at the seams.
"Depending on the season, either weekly or every two weeks, I will freshen the suits with Dryel (Walmart sells it at less than $11 for a six pack). Dryel works by 'steaming' the clothes in a nylon bag, leaves a light scent, and removes 99 percent of the stains I have thrown toward it. I will steam no more than two garments at a time (instructions say you can do four). Before steaming, I will use the Dryel sheet and go over any stains I notice to pretreat."