Biggest cause of static electricity is synthetic clothing.
So don't wear nylon when repairing PC's.
Memory should be delivered in an anti-static (metalised) bag. Keep it in there until you have grounded yourself, preferably using a wrist strap and cord to a water pipe or other known good earth point. At least touch yourself to such an earth point before removing/adding memory or any other tinkering under the hood of your PC.
Not really, you would insert your RAM stick into the slot. I would also advise you to check if the RAM stick that you're purchasing is compatible with your laptop. In this case, if you're using a laptop, you would need to buy a SODIMM RAM (the shorter RAM stick) and make sure you pick the correct RAM speed (e.g. The RAM stick's speed I installed in my computer was 2666 MHz). I believe you can determine this by looking up your processor information (type your processor's name - you can find it in the about section in system settings) online and jumping to the memory section.
There are plenty of guides to installing RAM in your laptop on the Internet if you need it.
Oh, and once you've installed your RAM, the power button will flash for a while, this is because the system is checking the newly installed RAM stick. If the power button stops flashing and the system boots normally, it means the system has accepted it (you can check in 'Resources' in the system monitor or install GNOME Usage). If the system constantly beeps, then the RAM stick is not compatible with your system.
I'm not sure about new machines but on older ones it is best to use the same type as already installed unless you are replacing the existing .... ex: if you have 4 RAM slots and 2 are being used choose the same type RAM as already installed .... if you have only 2 slots and are replacing both no need to worry as long as your machine can handle the increase ....
On new machines someone mentioned it doesn't matter as long as the spec's are the same .... but I can't swear to that .....
It isn't scary replacing RAM .... I have always used rubber gloves (the medical kind) so as not to get oil on computer parts .... also helps with static electricity .....
Sorry but I beg to differ .... on my Acer they along with the CMOS battery are UNDER the mother board .... with no opening on the back of the case .... to replace the CMOS battery I had to completely remove the MB and there were my sticks of RAM ... it was a PITA project ..... believe me