Writer and artist Austin Kleon describes how he tackles work in his book Share Your Work:
Building a substantial body of work takes a long time—lifetime, really—but thankfully, you don’t need that time all in one big chunk. So forget about decades, forget about years, and forget about months. Focus on days.
The day is the only unit of time that I can really get my head around. Seasons change, weeks are completely human made, but the day has a rhythm. The sun goes up; the sun goes down. I can handle that.
This is an excellent advice on how to approach tasks that seem overwhelming. Just focus on days and you’ll get there.