Quicksilver+Relaunch

Quicksilver Quickie: Relaunch an app
Here's a Quicksilver quickie for you all: Next time you need to restart an application for whatever reason, just invoke Quicksilver, type until you've got that app in the command window, tab over to the action and type Relaunch. Execute with Enter and watch in amazement as the application quits and restarts. I use this handy shortcut all the time, and as much as I hate to say it (because I know it's annoying), I miss this simple functionality any time I'm working on my Windows PC. — Adam Pash