Laziness, let's admit it.. we all have it in ourselves, no matter how workaholic you are.
Laziness, a trait which seemed pretty disadvantagous to another person's point of view, turns out to be a advantage to humankind. Keep in mind that procrastinate and being lazy are two different things. Procrastinate is sidetracking from quests which requires primary priority, while laziness is just being lazy. THERE'S A DIFFERENCE!!
Anyhow, laziness has been advantagous towards humankind, and IS in fact a trait that has been developed by our ancestors (Yea, didn't see that coming did you? Or maybe you already knew..).
I mean, there must be a reason for human to create cars, smartphones, and other technologies that have ease our daily life problems, for example; you'd probably rather pur all your laundry in a machine, put some soap or stuffs and let the machine do the work, than getting buckets of water, a small chair and handpower to wash all the dirty laundry you created. Or maybe you'd prefer to drive compared to walking. See... laziness has brought us to where we are now... well, which also brings a lot of problems too, like the invention of cars lead to increase amount of air pollution, being a potato couch leads to heart problems and some diseases too. So all in all, there's always pros for cons.

This may be like the least scientific post I've made.. what can I say, I'm too lazy to make overly scientific ones.