The suggestion I have is to fetch rather than receive which worked well for me over the years, meaning:
Instead of staff sending you email reports, it certainly is convenient for you to receive it in your inbox, and for you to view them as you find convenient time. However, the failure to this method is that before you know it, everyone is emailing you, your inbox gets flooded, and you spend hours on emails daily. From the office time to family time then to your personal sleep time. Less sleep, less productivity.
Email programs are not that well suited for tasks management,therefore we use programs like crm and project management.
Here, all leads and projects are created, and staff deposit their information in those bins. Now you can view the leads received,their progress and maintain tasks progress in the project management module. All without email intervention.

Another thing: if you initiate an email, do it stating your message without the need for a response or acknowledgment of receipt. Send it once, and avoid getting a reply. If you do, it’s an extra email and minute you are spending on. If you do receive an initiated email or report,avoid replying to it . Why should you? The email was sent to inform you of something,so leave it as that,unless of course it was a question or escalation. If you have a query on it, make a note of it on and review it during management meetings. You’ll get a clearer response faster.

Keep your phone calls short, you don’t need to get involved in every deal or every project in any company. You surround yourself with good partners and staff and trust that they’re doing their job properly. If they’re not, then train them to, don’t expect them to perform at your level of thinking,they never will. If they were,you would be working for them.  there are procedures to follow to replace them with more capable staff if current staff aren’t meeting your realistic expectations,even after training them.

I end of with a blog entry I made years ago,hope it helps.