Books on their own aren't insanely expensive compared to other things; three large cappuccinos cost more than a paperback, and two and a half gallons of gas cost more than a paperback.
Twitter is worth it if you like tweeting. Same is true of Facebook. Or Pinterest. Nothing wrong with having a social presence.
Nora Roberts, Stephen King, Lee Child and George R. R. Martin write wildly different books. Their writing, plotting and styles have little or nothing in common. But they all write books and characters that readers find appealing.
There is no debate that social media is a great tool for networking with others in our industry. It can lead to friendships, support, and serendipitous connections with reviewers, agents, reporters, or editors.
I'm not a good writer. It takes me a long time to get there. I write and then rewrite and revise and do it over and over until I'm satisfied.
It's easy to fall into the trap of thinking our careers will come to a standstill, or worse, crash and burn if we aren't social media butterflies.
Don't add people to your subscriber list just because they once wrote you a note. Or once answered a note you wrote to them. Don't put your address book into your newsletter database. Let your readers sign up.
Don't spend more than 10% of your marketing/PR budget on a trailer. Trailers have to be marketed, too. So, far too many authors wind up marketing their trailers instead of their books.
You shouldn't talk about yourself all the time - most of us aren't for sale. Our books are. Talk about them. It's not a question of whether or not you're fascinating on a personal level - it's that your trivia and trials might not have any connection to the tone, tenor and sense of your books.
There's almost no author alive who isn't weathering the tumultuous changes in the publishing industry.
Vera Caspary wrote thrillers - but not like any other author of her time, male or female. Her specialty was a specific type that she pioneered - the psycho thriller.