I recommend Gua Sha.

I've been using a gua sha lately, and it seems to be surprisingly effective, so I recommend it! I just bought a cheap heart-shaped gua sha from Olive Young and tried following along with a YouTube video.

They say using a gua sha improves blood circulation and helps refine your facial contours!! It also feels really refreshing to use it to loosen up tense shoulders. There are various types of gua sha, but I recommend starting with an affordable one like I did.