psych yourself up
phrasal verb with psych verb uk/saɪk/ us/saɪk/
informal
为（困难的事）做好心理准备
to try to make yourself feel confident and ready to do something difficult
I have to spend a little time on my own before I give a speech, psyching myself up. 发表演讲前我得自己一个人呆一会儿，做一下心理准备。