Oh, and I meant to include this in the previous post.  I thought this was great:

“The type of prayer engaged in must suit the amount of time that can be set aside for it.  For example, a short aspirational or mantric prayer like ‘Help me, Lord, for I am sinking!’ can be rhythmically recited while waiting for the bus or driving…” {emphasis mine}

I will try this next time I’m waiting for the metro…hehe.