Tis the season of all slouchy sweaters, knits and cardigans. And we all wearing it often cause it keeps us warm, but by wearing our cozy piece often it can takes a lot of problems with you. I'll tell you mine solution.
Wear a t-shirt underneath your sweater, no not a tanktop, but a t-shirt, why? Cause shirts has sleeves and tanktops not. With this way you don't sweat in your sweater, you don't have too wash unnecessary and it saves you a lot of pullings. What to do with a crop top? Simple, pull your shirt up over your bust.
I do this always and nobody notice.