If you feel like you hate everyone:

eat

If you feel like everyone hates you:

sleep

If you feel like you hate yourself:

shower

If you feel overwhelmed by your thoughts:

write them down

If you feel stuck in the past:

plan for the future

If you feel anxious about the future:

focus on the present

If you feel restless:

take a long walk

If you feel like giving up:

remember a time you succeeded