If you want to be a master of the machine use C/C++; if you want to be a slave use Java; If you want to be a slave of a slave then its C# for you. Simple :)
( Disclaimer : My comments are limited to only the above 'popular' languages in discussion. Also I program purely on *nix, so I am not aware of your other dark or better worlds out there )
I have been hunting for a good GTD application which weaves seamlesslsy with your life ( Gmail in my case ). So far the only application I have been content with is RememberTheMilk. Check out it's integration with Gmail using the Firefox plugin.
( Disclaimer : My comments are limited to only the above 'popular' languages in discussion. Also I program purely on *nix, so I am not aware of your other dark or better worlds out there )