Time manipulation is an amazing thing and not at all difficult to manifest. We have all had days where we have been overwhelmed with work and each time we look at the clock we grow more frantic with the realization that we simply do not have enough time to complete all our tasks or to get to where we are going in a timely manner. The trick to this skill is to not let time get away from you. By consciously and calmly repeating to yourself the mantra, "I have all the time in the world" or "I have all the time I need to complete this (and name whatever it is you need to accomplish)" time will expand and you will have as much time as you need.
The trick is manifesting your will. You need to stay absolutely calm and focused and really and truly mean it when you say you have all the time in the world. It's the getting flustered, the rushing, the nerves and only that, that makes this an impossibility. Next time you're under the gun time-wise, take a moment to think about what I have said. Take a deep cleansing breath and tell yourself that this is just fine, that you have all the time in the world. Know in your heart and in your mind that there is no hurry, everything is perfect and as it should be and I promise that you will have more than enough time to accomplish your task. Stay in the moment and watch the magic happen.
Altering one's perception of the passage of time is a very powerful and effective tool.