I know I'm not the only timer nerd here -- check out three Mac-friendly ways to time your activities and make sure you stay on track.

ProdMe - Dashboard - Status

Looking forward to trying this, but the DL link appears to be temporarily overwhelmed.

Clock chimes return to Mac OS X! ProdMe replicates this greatly-missed feature from Mac OS 9, and also provides two additional modes for repeating audio alerts. In addition to traditional clock chimes, ProdMe also provides the option to play a sound at any time interval, using any of the available alert sounds. Great for anyone who finds that time tends to slip away faster than expected.

Features:

• Chimes can be set at either arbitrary time intervals or synchronized with the clock (like traditional clock chimes).
• Multiple copies of the widget can be open at once, with independent settings for each copy.
• Choice of five different background colors.
• Honors 12-hour or 24-hour time format (as specified in the International system preferences).

Konfabulator - Gallery - TenPlusTwo

Haven't tried this one yet either (don't use Konfabulator, myself), but I'm a fan of its inspiration:

Can't stop procrastinating? Force yourself to work for 10 minutes, then force yourself to take a 2 minute break. Repeat.

Leave this countdown timer running, and it changes colors and plays sounds to indicate what you should be doing.

Minuteur 4.3 - MacUpdate

Finally, in other timer news, my own timer of choice, Minuteur, just keeps on adding great little tweaks. From the version 4.3 update notes:

• Add fullscreen mode.
• Add Dock menu.
• Add dynamic Dock icon.
• The ruler contextual menu is now editable.

Fullscreen mode is pretty sweet if you want to run a timed dash but not let the allure of your Mac distract you. Just creates a big old black screen with the time counting down. Very cool.

And don't forget -- Minuteur's got tons of neat little affordances to control the timer, so be sure to read the "About Minuteur" section for instructions.