Just like the post office, geocachers are out searching rain or shine. The game is more popular during the warmer months, but you will often see people trekking through banks of snow. The thrill of finding your first cache is just as exciting as your 250th find, the anticipation builds the same each time.
So you've found a bunch of treasure-troves over the weekend. Now what? Log 'em! There are a variety of options available when logging caches, one is 'DNF' (Did Not Find). It is one of the most important types of caches to log, since it will help other cachers who may try to find it. The person who placed the cache will receive a notification that they need to check the whereabouts of the cache. The cache could very well still be where it's supposed to, but may need an update on the difficulty level. Other reasons for caches not being found; it may not have been put back correctly, or it was muggled (a non-cacher removed it). Whatever the case may be one thing remains the same, the cache needs some attention from it's owner.
The steps to logging a find are pretty simple: Sign-in at geocaching.com, find the cache page and then click on "log your visit" at the top-right corner of your screen. There will be a variety of options under the "Type of Log" drop-down menu, such as 'Found It' and "Didn't Find It". Make sure to make a few notes even if you weren't able to locate it or upload a photo of you and the cache.