How do you safely bring ingredients normally stored cold to room temperature?
Eggs are actually pretty safe to leave at room temperature anyway; supermarkets don't bother refrigerating them, and you can be damn sure they're not going to risk losing any money through spoilage. I keep mine in a ceramic bowl on the counter top.

In general, simply take the required ingredient out of the fridge a couple of hours before use, keep it away from heat sources and out of direct sunlight.