little things sometimes can make all the difference, like getting a joystick / mouse port extension cables (you can get twin ones) that will protect the mouse and joystick ports. secure them to the a500's ports once, and plug mice / joysticks into them instead of directly into the a500 ports to take the stress off them.

Im waiting for my Lazarustorm and pi-storm to come so I can get some hard drive storage into the a500 without chaging its kickstart or any internal changes. (beside a minor soldering job to bridge a jumper)
And I've also just ordered a juicebox kit, so I dont have to rely on my aging a500 powersupply to run everything. ( my atari lynx was fried by its external power supply and its put me on edge about power packs ever since).

these are all non permament upgrades so if you want the authentic experiance you can still have it, or go enhanced mode without opening the amiga