Let's get this topic started.

Volume 2, Book 21, Number 228:

Narrated 'Aisha:

Allah's Apostle used to give up a good deed, although he loved to do it, for fear that people might act on it and it might be made compulsory for them. The Prophet never prayed the Duha prayer, but I offer it.

Not the one I was looking for, but its a start.

Weigh your deeds before its too late!

Doesn't time seem to be flying faster and faster by the day?

Indeed, the Prophet(SAW) told us that one of the signs of the Last Day would be that “time would move faster - so that a whole year would pass like a month, a month would pass like a week, a week like a day, a day like an hour, and an hour like the amount of time it takes to kindle a fire.” {Ahmad}

This means we need to ACT now - how long will we put off good deeds till tomorrow deluding ourselves into thinking we can be more "religious" when we get older? How do we know we'll still be alive tomorrow let alone when were older!