Easy "Auto Tapper" Achievement...
	Various Steam Achievements...

This is pretty straightforward, you need to click ONE MILLION times on the story screen (where you can have interns get you money per second and get money per click) to make this easier, use a macro and leave the PC clicking away at night (or when you are not using it). There are a lot of macro/script tools out there and since its a clicker game, the developers do not frown on using scripts. Now, remember that both the right and left mouse buttons count and you can speed it up a little by alternating between right and left really fast.

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
20 Hour Work Week	Get any character to level 20.
Arithmophobia	Buy 150 Upgrades.
Auto Tapper	Tap 1,000,000 times.
Big Boy Pants	Reach level 89.
Efficiency Expert	Reach level 48.
Executive Bored Room	Unlock the Executive Boardroom.
Friendship Power	Place another character on the same floor as Milton.
Half Way There	Get any character to level 15.
Pyro	Burn The Building Down.
Too Many Interns	Own 30 Interns.