If you don't plan your time, someone else will help you waste it.
— Zig Ziglar
Time is your most valuable resource; protect it.
We live in an era of span. Every day it's a little harder to avoid distraction. Your phone, your email, notifications apps, and work social chats. We live in constant interruption.
However, if you want to do deep work, work that matters, you will need to acquire the habit of making that decision in advance.
You are probably now so used to interruptions that you will need to quiet your internal voice not to get distracted. You will be tempted by your inner voice inviting you to stop, check your email, or get a coffee.
You will be tempted to resolve the daily problems and postpone the long-term work.
Doing work that matters is hard. Making a difference is hard. And it's a decision that you need to make in advance.