Discarding unnecessary items can make you more productive and improve your mood.
Proactively put things in their place and throw away things you do not need. Make it a point to put something away every chance you get.
The popular KonMarie method  involves taking inventory, organising and discarding.
10 - 45 min
Can be done a little bit daily or on a bigger scale weekly
Bigger decluttering jobs may take longer than 1-2 hours. In this case, you should manage the process to fit around your schedule. You do not need to complete the decluttering in one session.