These days, multitasking is a normal thing. The key here is how you manage things. Ordinary people will have to manage multiple tasks i.e. research, work, family, personal interest, etc every day.
In my opinion, you need a plan for everything and try to keep it as simple as possible. Put some objectives and your goal must be SMART. SMART is an acronym for Specific, Measurable, Attainable, Realistic and Timely. There are lots of articles on the web that discuss this.
The common flow of a research activity is:
- Do something about it
However, it is important that we plan before we start anything. Successful people finish what they start. For example, if you plan to read a 5 pages article, you need to plan how much you need to read, do something about it and write. This may take about 3 hours.
If you plan to read a 100 pages thesis, the process to complete the read, do something about it and write may take 1 to 3 days. The numbers of hours dependent on you. Reward yourself when you finish a task. Share what you have learned with your supervisor and peer.