If you don't already have a swipe file, you need to start building one as soon as possible. Artists face a blank canvas. Writers face a blank document. Marketers face an empty page. And all three of them solve this problem the exact same way: They steal.
Good marketing (the type you don't mind and that may actually be enjoyable) takes hard work. Bad marketing (the type you remember forever and complain online about) takes little to no work. And earning trust — the privilege of asking for the sale — is hard work.