>Can anyone please share information on his/her experience with website statistics programs. (You know those programs that mesure the amount of traffic on your site.) I would like to know wich programs are out there, wich are good and wich I should avoid.
It really depends on whether or not you will be setting up these stats as server side or client side.
For server side: the two that come to my mind first are http-analyze (http://www.netstore.de) or analog (http://www.statslab.cam.ac.uk/~sret1/analog/).
For client side I would highly recommend WebTrends (http://www.webtrends.com) they, I feel safe to say, are the best on the market today. Yet, due to this fact they are not free. Though you could probably get an evaluation copy to try out for a while.
As far as free client side stats programs it depends on whether or not you have access to your server's raw log files. If you do have access then there are a million and one different free scripts that will parse these files for you and give you the info you want. Which script you decide to pick up really depends on what type of info you are trying to find out about your visitors and their actions. Going to http://www.hypernews.org/HyperNews/get/www/log-analyzers.html will get you started.
If you do not have access to the Servers Raw Logs then your options narrow down quite a bit...though I have had some fun with a script titled "Logger" found on http://all-yours.net/scripts/mail-log.shtml Give it a look.
What to avoid? hehe that falls into the 'buyer beware' area of any script you are going to run on your site or personal system. If you do not understand the code and do not trust or know the person you received the code from...be careful. Other then that just avoid any stats program that doesn't do what you want it to.
Yours In Heart