Deadlines are important? Really? I know, this seems obvious, but trust me some people forget that there are time limits to things. One of the most difficult habits for many designers is time management. In the world of real clients and looming deadlines, you cannot stroll through the garden of ideas while the world passes you by.
Don’t take your time. Deadlines are real, and they are important.
Time is money and missing a deadline can wreck your reputation as a professional. If there are extenuating circumstances or deadline shifts needed due to client changes, just make sure to communicate with your client every step of the way.