How are people ensuring their server keeps correct time?

I thought I had installed NTP but the time is incorrect again.

Wondered if other people have the same issue and how your dealing with it.

If/when a client tells us that the "time" is off, we usually just pop into the server, and proceed with the following:

date
(Gets the date and time)

hwclock -r
(gets the hardware time)

This is to see how far off it is. (sometimes, its only a couple mins off)

hwclock --systohc

Syncs the two times together.

(Then as you said NTP)

ntpdate -u pool.ntp.org

Then rerun the first two, to make sure all is accurate...

That usually fixes the clients time issues.

(It might not be necessary to run all of that, but we do it that way anyways for better accuracy.)

What getstreamhosting says.
We also run our own NTP Pool to ensure time on all Systems is accurate and the same.