Historically villains are not very good at what they do. They usually fail, thankfully. If they were better at their jobs we'd all be robbed blind and walking around with obedience collars on our necks. While some may enjoy that sort of thing, I am vehemently against it.
In general, supervillains are very bad at their jobs. Which leads me to believe that they should change occupations.
Lets talk about Calendar Man. He's a Batman villain who commits crimes on specific days of the year. It's kind of his gimmick. But committing crimes on specific days doesn't make you more successful. It actually hinders you quite a bit, allowing Batman to punch you repeatedly in the face. This is a bad thing. Unfortunately, his gimmick was stolen by the Holiday Killer in Batman: The Long Halloween. That means that Calendar Man is not only ineffective, he's not unique.
Now let's consider an old favorite: Spider-Man's villain, Doctor Octopus. Recently (Amazing Spider-Man #600), it was revealed that years of getting punched in the head by Spider-Man had caused Doc Ock to develop neurological damage. In other words, his head got punched so much his brain began to turn to mush. Doc Ock wrapped himself up like a desicated mummy and tried to get revenge on NY one last time only to (you know where this is going) get punched by Spider-Man. If there is someone who needs to pursue a new line of work more, I do not know him.
Then lets examine some villains who did change occupations. The Riddler went from being an insane criminal quasi-genius to a private detective. This change in occupation netted him more money and respect than he ever received as a criminal. It's also been over a year since he swallowed his own teeth because Batman punched them in. This is definitely a step in the right direction. Norman Osborn went from wearing a form fitting green and purple costume throwing pumpkin-shaped explosives from a bat-glider to becoming America's top ranking national security officer. And that's worked pretty well for him too. He now lives in a beautiful penthouse and gets to desicrate Iron Man's armor on a daily basis. Of course things may change in January during Siege (I do love's me some classic Thor beatdowns).
Regardless, villains who have changed occupation from traditional super-villainy to something else have seen a dramatic increase in prosperity. And that's why we need a supervillain career fair. In fact, if they were smart, superheroes could get together and organize this fair. Batman and Superman should work to get their rogues connected with major companies in order to make everyone's lives easier. Mr. Freeze would be better off working for Frigidaire. Poison Ivy could work for Greenpeace. The Toyman could work for Hasbro. Clock King could improve the design of a Rolex tenfold. I'm actually pretty sure Braniac already works for Apple.
It's so ridiculously obvious, I'm really surprised that no hero has tried it before. But they should.
I mean shouldn't it be every hero's goal to turn this: