If you can't find the motivation to get to work on something, force yourself  to pick it up for just two minutes. The key word is force. Procrastination is tempting, but keep in mind that there is nothing physically stopping you from doing what you have to do.

After those two minutes, if you do not still want to keep going, put it away and go do something else. Even if you stop after two minutes, you will have two minutes worth of knowledge that you did not have before.

More likely than not, though, these two minutes will make it easy to just keep going. Often times, the hardest part is getting started.

I absolutely agree with this advice. I find the most hard period of doing one thing is at the first two or three minutes and we're more likely to get bored and then give up during these two or three minutes. It's difficult for me to focus on one task immediately. If the task is very important and I force myself to keep doing it for over five minutes, I'll be totally immerged into the task and it'll be muxh easier to keep going. But now, every time I want to do something, the phone will distract my attention and I couldnt get through two minutes and finally, I always fail at starting one task successfully.

Put the phone aside and just give myself two minutes to focus on the job at hand.