Time management and organization for PhD Student in first year?
In my time as a PhD student over the past few years,  I have really benefited from the simple old-fashioned technique of just making lists on a small notepad.  Whether in lab or at home,  if I feel disorganized or anxious, I just write down the things I know I need to do. As well, I can check the list of things I have already written down earlier in the day. Putting things on paper by hand is really a simple and effective way to get things "out" so to speak. Has worked great for me in my first 3 years of my PhD.  If I am on the go and can't write something down Siri (on my IPhone) is awesome for reminders. Don't stress too much either. Work hard, stay organized, but make sure you still have time for sleep, hobbies, friends, and family. Otherwise you will drive yourself crazy. I ensure this for myself by not working on Saturday's or Sunday's. Believe me, in the long-term, a rested and clear-minded scientist working Monday-Friday will outcompete a mentally exhausted scientist working 7 days a week. I learned these things while an undergraduate student from one of my favorite professors. Not only was he an awesome teacher, scientist, and Department Chair, he was a Army Colonel working in military intelligence several weeks out out the year. I figured this guy must know a thing or two about life. I put it into practice and come to find, he was right! 

Best of luck to you!