I am a total sucker for sleeping packs/mask. I feel that they are such an easy complement to my dry skin. During winter time I use sleeping masks every other day, since my skin is so dry. I do love using sheet masks as well, but this is so simple, and adds that bit of extra to my skin.
I really love this sleeping masks from Missha. When I wake up in the morning my skin feels soft, hydrated and it looks more even (I have problems with redness).