I ward the enemy bot-buff, whether red or blue, about a minute before it's due to respawn. Hey, allied jungler/mid? Want a free kill? Eh? Eh?
EDIT: Half-assed post was half-assed. Other half of the ass: Every time I land a stun and see the guy I just stunned suddenly not have a health bar, I smile. Every time Taric's manly jewels ruin the enemy's armor for my ADC, I smile. 2 seconds of Amumu's stun or Alistar's knock-up is a heaping messload of burst damage the rest of your team can do without so much as batting an eye. CC wins fights more than another source of damage.
And yes... I play the tanky CC supports.