Don’t worry about whether your words are big enough, or if what you have to say is important enough. The minute you worry about writing big, you’ll be writing badly, like putting on a posh voice. Start small. Think inconsequential. Nobody’s life or death depends on your writing. It doesn’t matter!
Relish all those in-between places and times that used to get written off as losses. Traffic jams, waiting rooms, transit… they are opportunities to perceive and write. Even familiar and ordinary situations can become richly interesting. The world is suddenly connected in marvellous new ways.
Keep a notebook on you at all times (except when bathing).