Reflecting is a key part of learning and improving. It is part of being self-aware and being mindful. There is value in the actual activity of reflecting and writing down the reflections and then the later use of them. Reflections are great tools while you are a student, on potential work terms or internships, and when you graduate. It is possible to do reflections that have no value, but if you take reflecting seriously, the value can be immense.
There are different types of reflections. For example, you can have pure 'academic' reflections each day, after each class. What did I learn today? Where am I struggling? What am I having problems with? What have I now conquered? Why? Something took less/more time or effort than I expected, why? I did better/worse than expected, why?
You can have 'life' reflections each week, month. What have I learned about life? My abilities, my reactions, my mistakes, lessons-learned, etc.? This type of reflection can be very good for understanding a journey and how you are changing.
You can have 'work' reflections each week, month. What have I learned about the job, the work culture, what do good workers and managers do, what do bad workers and managers do? How are you doing as a worker? Where are you improving?
Handwrite them. Typing is not as good. More of the brain is used when you using pen and paper.
Do the weekly reflections Friday eve, so you can reflect upon them for the entire week.
Once a month, review the weekly reflections. Several times a year, reflect the last few months. And yearly, review all of the monthlies.
Perhaps have a template
What did I do this week? Anything out of the ordinary?
Any key lessons learned this week?
What can I improve on/do to prepare for the next week?
What did I do differently from last week in my areas of opportunities?