Wow...I can't believe anyone suggested pigtails............I'll get to that in a moment
1) Quick wire push-in terminals......Bad....the contact area is a fraction of what the screw provides.
2) Is wrapping each switch and each outlet with electrical tape the best method when installing devices? Unless you have metal boxes, not worth the trouble.
3) Is Leviton the best "big box store" brand? What about Lutron? Both are good...but each one has different grades
4) I know for safety reasons, the breakers should be turned off when doing electrical work.......I get it. However, for time savings, my friend said to just buy insulated electrician gloves for $20. Do you guys 100% of the time shut off the power when swapping switches/outlets? Have you tried working with 12g wires while wearing gloves? Just turn off the breaker. If you don't know which outlets are on which breaker, time to find out.
Now....pig tails....
As you will find out, your outlets are daisy chained. Unless you had a good electrician who wired your house, chances are, they used the outlet as the 'junction' for your wires. In other words, line comes in...ties to one set of terminals (screws)....the line going to the next outlet ties to the other set of terminals.
Hence, you are depending on that small strip of metal between screws to continue the ckt.
And....it's a whole lot of fun shoving that mess back into the box.
Do yourself a favor.....do a pigtail. This is where you use wire nuts to connect the daisy chain...and you add short lengths of wire to the wire nuts....these are what you wire to the outlet. The wire nuts get shoved to the back of the box where you never have to mess with them again...and it's a lot easier to shove the outlet into the box with only 3 wires vs 6 wires.