“Leela: Why are we listening to them? It is a waste of time.The Doctor; It is difficult to know what will be a waste of time until after the time has been wasted, by which time it is too late. So predicting what will be a waste of time is something of a waste of time. Unless it gives you pleasure of course when it probably doesn't count as a waste of time.Leela (yawning): I am sorry I did not hear what you said, Doctor.The Doctor (smiling): That was a waste of time then.”
“There is a certain elegance in wasting time. Any fool can waste money, but when you waste time you waste what is priceless.”
“Lisa: It just seems a bit of a waste.Ed: Waste of what?Lisa: Waste of time… of life.Ed: That’s the point, isn’t it? To waste time until you die. You have to waste the time.”
“Life is too short to waste time complainingDon't waste your time with explanations: people only hear what they want to hear”
“Time you enjoy wasting is not wasted time.”
“We told him to get on with it. We liked wasting time, but almost nothing was more annoying than having our wasted time wasted on something not worth wasting it on.”