I just remembered where I saw my first overclock. I went to a computer fair back in the early/mid 90's with £350 burning a hole in my pocket. I was escorted by two friends who were both into their PC hardware and they basically spent the money on my behalf!
We went back to one of their houses and assembled the gOOds, suffice to say the PC wouldnt bOOt lol
I phoned up the merchant from the computer fair and said "Oi mate this motherboard don't work" he said "Nah it works fine, bring it round to my house and let me take a lOOk". Memories of lugging the whole case on the Tube and heading off to Clapham . . . got to the guys house, his front room was rammed with PC hardware. He set the case down on a table, looked inside, took out the ram, put in some of his own ram and it booted perfect! lol
he said "Its your memory mate!" to which I couldn't say very much

but while I was there he noticed which CPU my mates had bought, think it was an AMD K6/II running at 100MHz ish, he offered to overclock it for me by fiddling with some jumpers. Lol now I think about it that guy was pretty cool.