Screw minds, the future of our nation and all the other things we really want to save, the value of the word no is highly underrated and ludicrously underused. If you disagree with me, do me one simple favor; think of how many times you could have avoided a shit load of meaningless work and fuss if one person had said no.
I need this by tomorrow... Ummmm no. You can have it the day after because a life will not be saved if something is handed in a span of 24 hours just so you look at it three days after you receive the thing.
True, sometimes, the word rush is used, higher ups are beckoned and the whole boogie man routine is put into play. (BTW, the boogie man routine consists of an AE or Traffic person bluffing their way into your work queue, so you do what they asked for first, because they "talked with the VP", or the "President needs this with the utmost urgency"). The fact of the matter is that sometimes, a negative response can actually yield positive results. Saying no to a rush job that isn't rush actually allows for work to be distributed humanely, produced with higher quality and little suckup power hogs learn their role and see how the game can be played so we take them seriously when they say rush.
So kindly, next time someone suggests you do too much work in too little time, two letters can save you a whole lot of trouble and also contribute to strengthening your spinal chord.