Noob wants to understand task switching

[cpsmith58]

I come from a Windows PC world, which I realize may help or hurt me! Anyway, say I want to run gmail and a browser and swap back and forth. Or I get distracted because I'm ADD and end up in Apps B & C and want to go back to App A. In Windows (you knew it was coming), I press Alt-Tab. On a DroidX, I do ????

Or is there actually an entirely different paradigm that I need to wrap my head around? I did a lot of searching, but if when I looked for "Task Switch", I didn't really find an answer.

THANK YOU.

[aminaked]

Hold down the phone's home button for a couple seconds