Well, I've not been doing 8052 stuff for long, but I have been doing electronics stuff for a while. Here's a quick list.

MetaIce XF Emulator - Nice piece of kit.
Needhams EMP-11 Programmer - does exactly what it says.
Antex 18w Iron with a very thin tip. Last one lasted 10 years.
Metalink ASM51 Freeware assembler
Crimson editor
Lots of stripboard
Local Radiospares
Perspiration
Pinch of inspiration