I don't have a droid device handy anymore - but I seem to recall under settings page there should be a list of how much RAM is in use by your running apps at any given time. (won't give a graph throughout the day, but somebody probably made an app for that.).Is there a way that I can see how much RAM my phone uses during daily activities? Can I load an app in the background that will track RAM usage throughout the day, which programs are using the most, and what the statistic of it being used is?
From what you describe your usage though, I wouldn't expect that Half-gig to be an issue for you.