What do you prefer?

Would you rather store it within your calendar or your task manager? Both RTM and Gcal are integrated extremely well within my Gmail interface (took a ton of javascript), so I could go either way.

I suppose an argument for Gcal is that it could slip your mind to check your tickler file in RTM. An argument for RTM is that you only want real, true appointments within your calendar.

What do you think? What works better for you?