For some writers, the hard part is the actual writing. I agree that it's difficult (especially if you have major writer's block), but since becoming published I've discovered a new challenge: Marketing.
While most publishing companies do some of the marketing, the author is expected to do some as well, epecially if the author is unknown. Most writers are introverts, including me, and it isn't so easy asking people to buy my book. Heck, most the time when I meet new people and they ask what I do I forget to say that I'm a published author. Why? Because I feel like I'm tooting my own horn.
Most marketing is done through social media sites. I do a majority of mine through Facebook, but so does everybody else. Therefore, many of my Facebook friends have something to sell...makeup, weight loss supplements, jewelry, etc. I'm glad that so many people have found their passion in selling a product that they love, but I see so many of those posts that I usually just scroll on through. I worry that people do the same when I'm plugging one of my books. Of course I want people to read my books, but I also don't want to annoy anybody. I'm proud of my accomplishment, but I don't want to brag. So, how do I find a balance between posting too little and not posting enough?