I don't have this luxery anymore, but when I could smoke in my room at my leisure, I'd do kind of what you did.

I'd start the bowl up, probably take a few hits, watch some Discovery Channel documentaries on YouTube (fuck yea) and then basically I would only hit the bowl when I remembered to, and I only remembered to when my high was wearing off slightly.

So you only smoke as necessary, instead of just cashing a bowl in 5 minutes. Not sayin I don't like to do that too imp: just sayin.