北京航空航天大学 or 北京师范大学 ?

The painful book clearing I have a little collector inside me that I need to battle. Or I will end up having too many things that I will never use. I am now moving back to Stockholm to continue my studies. The question is: How do you people deal with the heart ache of removing the things that you like but rarely or never need?? Should I bite myself in the finger, poke my eye? To focus my on something else? I do not drink so I can't 'drown' my sorrows with a bottle of <whatever people drink, haha!> I know the question is not about learning language but I will need your support out there to continue with the heavy task that is in front of me! 谢谢！