Just over a year ago when I was leaving HI, I was packing all my possessions and I got rid of everything I could.
Aside from clothes my largest group of personal things were computer gear. I reduced two large boxes down to two smaller flat rate boxes and sent them off.
I kept obscure cables that I rarely used but were so difficult to find that I felt value in holding on to them. I kept everything I thought I'd find a use for. Here I am a year later and I've taken another stab at those parts. I kept the obscurest of the obscure: the USB male A to male A and the USB to proprietary connector for an old phone. I got rid of the useless: compact flash with 128mb storage and WiFi.
I'm now down to one small flat rate box. Some things were difficult to get rid of, but if I haven't used it in over a year then it's becoming more a burden than buying it again if I ever need it will be.
I also organized my Dremel bits into one container, put all my tools into the general tool boxes even if they were generally used for tech.
When I opened my tool box I realized I had way too many tools. My tool box had a funny smell to it; I've smelled it in other toolboxes before and now I know what it is: mold. A few of my screw drivers had mold all over the handles. No thank you. They're gone.
Everything is organized and I'm getting rid of enough to feel accomplished.