Introducing...
[spoiler=The emotion switch!!]

[/spoiler]
With the touch of a button, you can redirect the neuron firing targets in your amygdala to avoid it reaching the hippocampus. No longer will you feel bad when your whole family is murdered in front of you. No longer will you feel frustrated when people don't do what they told you they'd do. No longer would you care about people's opinions of you. For a simple $352.99, it can be yours. Installation into the brain is free and painless--not that you'd remember any of the procedure.
In the next version update, we'll put in the "on" button.
I wish that I have more time to read the books I want to read.