I keep this saying in my eyeline:
Selling is 80% preparation; 20% execution.
I need to remind myself of this at least once a week and sometimes once a day.
I need to remind myself that reading books (for comps, for assessing editor's taste, for keeping up on what people are reading), reading Kirkus, reading PW, and yes following Twitter conversations is real work, not slacking off.
Effective selling is the result of effective preparation.
Effective preparation is writing a compelling pitch letter, complete with effective comps, and statements about why the book belongs on that particular publisher's list, accompanied by a carefully copy edited and formatted manuscript.
That takes time.
Thus the reminder.
Do you have sayings taped in your eyeline?
What do you need to remind yourself to do...or not do?