Large tasks can be overwhelming. Thinking about a gargantuan job ahead of you can be immobilizing. Hence I loved one of my colleague's expression that he shared with me.
How do you eat an elephant? One bite at a time.
A great concept. Break the large task into smaller manageable items on your to-do list and just keep knocking them off until all of them are completed. A successful strategy for accomplishing those things you feel initially are impossible.