Some people have spreadsheets with 1000's of rows. It is totally unnmanageable!
What can you do? Using Yoman, you can set reminders and appointments for the relevant clients only.
Then, even for a spreadsheet of 2000 rows, you can have only 20 tasks, linked to the most relevant clients that should be handled immediately.
This way, you no longer have to scroll through 1000's of rows every day. Your daily tasks are right in front of you. Best of all, from any task you can directly access the relevant spreadsheet row, write comments, set more reminders and appointments for it, etc.
It's a new way to work with spreadsheets!
And of course, you can always filter the sheet to see only specific kinds of contacts (only new, only assigned to you, etc.) to make browsing the sheet more manageable.