If you're not going to be contacting more sensitive components on the MB, just grab some part of the metal case with one hand while you work with another. You only need to do this momentarily to discharge any static. If you want to be extra careful, don't use a microfiber covered chair to sit in and don't scoot around on any cloth chair while working. Wear cotton clothing and not nylon or other synthetics. If you're environment is known to be very prone to static, you can also pre-discharge yourself by grabbing a metal sink faucet handle or some such thing. You don't need to get too anxious about this. Simple ESD precautions should be all you need for what you've stated as your purpose.
First and foremost, I am a total beginner to technology. So please keep that in mind when explaining what to do etc.
Now, I want to physically open my noisy and glacially slow Dell Inspiron 1525 to clean the fan, which hasn't ever been dusted. I want to know the precautions I should take before picking up the screwdriver. For instance, what's "grounding" about?
I don't have a pure metal object, a wrist thingy, a special mat nor a three-pronged plug. I do have a three pronged outlet however. So please explain in easy-to-understand detail how I can ground myself prior to opening the laptop.
Thanks in advance