Best way to "pin" a kernel

[Matt Ventura <mattventura@mattventura.net>]

Quick question: I want Debian to not switch Grub2 to a new kernel when I 
update
it, since I have a custom kernel on a particular machine. When I install 
a new
kernel from apt, I don't want to immediately use it. What's the cleanest 
way of
doing this?

Matt Ventura