Some tasks which are not directly related with users daily workflow is easily forgotten. For example a developer coding for most of his day may easily forget to log work a meeting he/she attended sporadically. To help them remember these kind of activities you can make some adjustments in WorklogPRO-Timesheet for Jira.
Create an internal task for meetings and mark is as "Always shown on timesheet". So when they open their weekly timesheet they will always show this task in their timesheet even if they have never log work for this task. Hopefully when they see the task on their timesheet they will remember the meeting they have attended and log work for the meeting.