i dont kno if this goes here. but what does it mean by "making sure you are grounded"
It simply means that you need to either wear a grounding strap and attach it to the case, or something metal near you that is properly grounded. What will happen, if you have any charge on your body (ie. Static Electricity from walking on the carpets) and you go to touch one of your components in your computer, it will transfer that electricity to that component and possibly damage it.
My suggestion is to simply touch the OUTSIDE of your case before you go digging around anywhere inside. Oh yeah, also unplug the power cord from the back of the PSU to eliminate all currents that can be shorted by dropping a screw or something.
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