It is true--if it is worth having or doing, it is worth waiting for. We have to plan and organize vacations, weight losses, a healthy lifestyle, summer break...It is important to take your time and do these things well.
I used to hate hearing that "you didn't gain the weight overnight, so you can't lose it overnight." It is true, but when you get started to change the way you have been doing things, it seems to take away from your motivation. One to two pounds a week is perfect, and any more can be unhealthy.