ok, so about this whole warmup deal..... on modern vehicles, just wait until the idle drops a bit, as it allows the oil pressure to stabilize (i know something to this effect was posted prior, but I don't recall anyone mentioning oil pressure
About the remote start deal... technically, it is illegal in most places no matter what transmission you have. It is illegal to leave an unattended vehicle running, both for the environment AND because so many vehicles have been stolen because people were stupid enough to leave them running to warm up. I understand that with most remote starters, if you touch the gas w/o inserting the key it will shut off, but the last time I checked, the law did not account for that. It may be different elsewhere, but I know where I lived in VA and WV it was illegal.
As far as not using the handbrake with a manual -- I forget who posted it and I'm not going to look for it b/c I'm lazy, but I assume you haven't lived in too many cold places or else you're just lucky. I had an issue with one car (automatic) where I set the handbrake everyday no matter what. One day I had been out in the snow and the brakes where warm so it melted the snow and made the brakes wet. I set the handbrake, and the next morning the wet brakes had turned to ice. This was evident when I had let off the handbrake and it didn't release and took no effort to lift the e-brake handle again. Just something to keep in mind