First of all please let me point out that the “pressures of the world” won’t actually “go away.” But it can be subsided and dealt with.
Some helpful tips are maybe to take a walk (if you’re up to it), take at least 5mins and breathe a bit with no destractions, walk up to a mirror and smile even if you dont feel like smiling eventually you will feel happier (believe me, i’ve tried it and it actually works!), look around and see something funny and laugh (even if it is not that funny), grab a paper and start writing anything and dont stop (this can be done with using your laptop), tear a paper in to smaller pieces until you cannot tear it anymore.
Basically try to do little things that involve only you and promote happiness and laughter. =D
I would suggest not to talk with anyone. If you tell people your problems, they may end up spreading it or bring you down even further. I dont mean to come off as bias, but this is what happens a lot. To sum it up in one word, gossip.
As for myself, I first turn to God. I have a great relationship with my Daddy in Heaven so coming to Him is easy for me. I simply tell Him exactly what is on my mind then I ask for Him to give me peace. I also sit with a guitar and sing worship songs praising Him, this calms me greatly! Another thing I do is start thanking God for sending His Son, Jesus, and allowing His Spirit to help me, inspite of what I am feeling. I also may do at least on thing I suggested to you.
Hope this helped! =)