Anyone that's ever had their kitchen done over knows that it never never gets done as soon as you wish it would.
Cheops' Law: Nothing ever gets built on schedule or within budget.
Songs seem to take me a long time. I don't know why; they're not especially excellent for taking so long.
The road to hell is paved with works-in-progress.
The Ninety-Ninety Rule of Project Schedules - the first ninety percent of the task takes ninety percent of the time, and the last ten percent takes the other ninety percent.
Your pictures would have been finished a long time ago if I were not forced every day to do something to earn money.
I should have considered it wrong to have finished the Frieze before the room for its accommodation and the funds for its completion were available.
If you look at the history of presidential memorials, it takes a long time to get them done.
There is, apparently, some law of nature decreeing that all home construction must double in its projected cost and take four times longer than originally anticipated.