Answer:
question #1 What you can do is fold it up nicely and put it in a plastic bag. this will keep it from wrinkling and/or getting any stains or marks on it. What i use is this type of bag that almost replicates plastic wrap so its pretty tight and thick.
Step-by-step explanation:
#2 There are a few ways you can hang clothes up differently. because if you dont have the right size of hangers and they are to big or small it can wrinkle them really easily. If the hangers are too small the shirt can kind of sag down. if they're to big they can stretch it out and when you take it off, all that "tension" gets released and its all stretched out. Also this is kind of just a little thing that MAY or MAY NOT help is if there is a lot of vapor or humidity in your room or wherever you store you clothing that may wrinkle it because the clothes are absorbing the water.
Hope i could help!