Meditation
Ik it can sound cringey but it helps me a lot too
Sit down, close ur eyes, breath in slooowly thinking ur breathing in all the good energy, and breath out slowly, explusing all the bad thoughs out of ur body.
While u do that take ur time to feel every inches of ur body, from toes to knees till the tip of ur fingers and the back of ur mind. And keep telling urself "problems is something some people cannot deal with, but i can" or sweet words u wouldnt usually tell urself
Do that for about 5 minutes