I don't suggest to ignore the past, just say that it may not be practical/feasible to keep every bit of it around. We still remember the importance of many now defunct technologies: Roman pilum, ancient oil-lamps, the crop cycle, the Ford T-model. These were important steps on your journey to our present word, and we still remember, but have only a few items preserved in museums.

About the difficulty of parting from things: I know, that is why i mentioned to create digital reminders, to help you remember the important parts of the past.

And what is also important: if you do not keep stuff, be responsible about the disposal. I do not presume you would not be, just repeating it should anybody else read our discussion, may this help him/her in making an informed decision.

edit: In Hungary, where I live, we have some nice collections about computer history. I know of 2 noteworthy ones, one is in Szeged, in a former military base, the other is at a university in Budapest. Both are public, the first being a museum, the second being a free exhibit. If the stuff I had was anything special, I'd consider donating it to them, if they needed it. You should also check around to see if some institutions would take the responsibility of preserving it, write some short letter about the things you wish to donate, their importance in technology, you know, the stuff that is hung out in museums to educate the technologically not-so-informed, and ask them if they'd take care of them. I believe you could find some places where it would be a nice item in a public collection. I'm sure they'd also give credit to you.