Word meaning "the act of intending to do nothing"

Not sure about "the act of intending to do nothing", but idling is the "act of doing nothing":

v.intr.
1. To pass time without working or while avoiding work.
2. To move lazily and without purpose.
3. To run at a slow speed or out of gear. Used of a motor vehicle.
v.tr.
1. To pass (time) without working or while avoiding work; waste: idle the afternoon away.
2. To make or cause to be unemployed or inactive.
3. To cause (a motor, for example) to idle.
n.
1. A state of idling. Used of a motor vehicle: an engine running quietly at idle.
2. A mechanism for regulating the speed at which an engine runs at rest: set the idle >higher to keep the motor from stalling.

You could get a subscription of The Idler and read it in the Idle Working Mens Club. (Although that sounds a bit too much like hard work.)

As Hugo said, including the "intending to" makes this a very difficult request; the best I can come up with is a way to express "intentionally doing nothing": vegetating.

I'm gonna go home and vegetate tonight.

To me this carries much more of a connotation of purposefully doing nothing, whereas idling can be merely the result of having nothing to do, rather than a conscious choice not to do something.