WHAT IS IT?
Vices are something that is considered immoral in society while virtues are the direct opposite of this. A small caveat might be inserted at this point to warn that too much of one will eventually lead directly to the other. Finishing, as we no doubt can imagine with a stunning realism, to a sort of philosophical Ouroboros.
WHERE DO YOU GET IT?
Although you might search the world over the only thing you'll have to show for it, at the end of the day, is a worn out passport and a dinner date with a rather nice customs officer who promises to bring his sexiest rubber gloves.
Ultimately Virtue and Vice are to be found in your actions and attitudes towards yourself and those with whom you share the world.
USING IT IN REAL LIFE:
There are so many virtues and vices that to list them all would be impossible. Your best bet is to pester a priest until he breaks down and agrees to your demands to tell you about them all.
Unofficial experiments on a variety of theologians have revealed that this will take about a week although much of this is down to the individual priest and the exact methods used 
However for those of you without ready access to the clergy here is a small list of both vices and virtues. 
- blasphemy (holiness betrayed)
- apostasy (faith betrayed)
- despair (hope betrayed)
- hatred (love betrayed)
- Sattva (goodness, maintenance, stillness, intelligence)
- Rajas (passion, creation, energy, activity)
- Tamas (ignorance, restraint, intertia, destruction)
- Loss of Judgement
- Incapacity to bear other peoples good
- Maitri (loving kindness towards all)
- Karuna (compassion. The hope that a person's sufferings will diminish)
- Mudita (sympathetic joy)
- Upeksha (learning to accept both loss and gain with detachment for oneself and others)
- Absence of shame
- Absence of embarrassment
- Concealment of wrongdoing
USING IT IN WRITING:
- Any hero or any character you write is going to have a mixture of vice and virtue inside them and it's going to be up to you, as the writer, to describe the situation where one attribute wins out over the other.
- It could be that your hero takes a stand against something that they know to be wrong.
- Standing by while something is happening might lead to a confrontation. Perhaps with the law, the church or the something itself.
- A magical twist might be to have the embodiment of the virtue/vice be brought forth into the world. Feel free to crank the wierdness levels to 11 as the avatar of the Absence of shame wrecks young Toshi's simple college existence 
MIGHT ONE TAKE OVER THE WORLD WITH IT?