Ways to Reduce Atmospheric Noise

Hi Folks,
My tinnitus is coming back as a result of a cold and I believe also, due to a hyper-sensitivity towards atmospheric noise. The primary culprit is my annoying refrigerator which is up against a corner. I live in an apartment and I have my audio components in the best possible location but its relatively close to the kitchen. I also have neighbors above me who make a good deal of noise, primarily floor squeaking. Should I try placing noise proof styrofoam along walls and ceilings with velcro? Advice sincerely welcome!