From practicality perspective, how do you use your personal knowledge base? Do you review it on a regular basis?

I have thoughts of keeping a similar database, but I kept thinking "will I ever use the collected details in the future". When I first started in computers on the Atari 8bit in Australia, I would collect as many of its software as possible, due to its scarcity. Looking back on it, I would ever only used 1% of it. The rest would be sitting it on the floppies gathering dust. I fear that the database that I collect would end up in a similar situation.