commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
opens the Google I'm Feeling Lucky result in lynx, the command line browser
searches through the linux dictionary for the word you're trying to spell (you can use regular expressions, e.g. "< /usr/share/dict/words egrep bro[c]+o[l]+i" )
retrieves the html from a random command line fu page, then finds commands on the page and prints them
alternatively, pipe to bash (add "| bash" to the end) to execute the command (very risky)
edit: had to adjust to properly display the portion that replaces HTML characters (e.g. " -> ")
!! will expand to your previous command, thus creating the alias "foo" (does not work consistently for commands with quotation marks)