Postica's a latecomer to the free online sticky notes arena, but it carries with it a few neat features that set it apart. First and foremost is the ability to attach any kind of file (up to 5 MB) to a sticky note, and then send that note to a friend, whether or not they have an account. Secondly, Twitter users can share notes and create new notes on their board, even designating the colour, by direct-message postica. For organising a multi-file project by yourself or in a group, Postica's a simple but attractive option. Postica is free to use, requires a sign-up.

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Whether you're adding notes inside a book or sticking a request to your co-worker's monitor, you can automatically keep a copy for yourself with Rediform 2-Part Self-Stick Message Pads. These wallet-sized notepads keep one copy of your notes in the book, and let you tear off a sticky version for placement elsewhere—in short, they're Post-It's with carbon copies built in for easy follow up. Office Depot's got a pack of six of these pads for $8.

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Windows only: There's no shortage of sticky-note-style reminder apps out there, but Hott Notes offers a lot of handy features in one package, making it worth a try on your desktop. The notes themselves can be coloured, sized, and set at custom transparencies, of course, but the notes also come in three flavours: Standard, text-style notes, to-do notes with built-in checklists, and scribble notes that let you draw with your mouse cursor. Hott Notes also rocks a portable version, so you can bring your reminders from desktop to desktop, and an alarm can be attached to any note you create. And for fans of "zen applications" (not our phrase, we swear), Hott Notes offers a "Note Desktop" that shades over everything except your notes. Pretty handy notes, overall, in nice-looking packages. Hott Notes is a free download for Windows systems only.

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Post-It notes don't have to be boring, square, and yellow any more: make your own sticky notes with any size and colour paper with the Scotch Restickable Adhesive Glue Stick. Just apply the magic sticky stuff to the back of any piece of paper, and stick and re-stick it anywhere you'd like. Over at the Cool Tools weblog, reader Bill says it helps him GTD:

I use it to make my various Getting Things Done/43 folders items and tasks stay put in my handheld binder. I jot my items and tasks down on variously coloured pieces of paper of whatever size I need, rub the magic stickum on them, and they stay put in my binder until I decide to move them around. My inner child is happy because I get to play with stickers and glue; my inner adult is happy because I can continually and easily refine my GTD system.

Miss out on the best of Lifehacker this September? Here's a list of our most-viewed posts of the month:

• Transform Your Classic Xbox into a Killer Media Center"Don't ditch your classic Xbox just because you can't play Halo 3 on it: nowadays it's easier than ever to transform that old neglected console into a Unix-based media command center."
• Find Out If Your Computer Is Secretly Connecting to the Web"If you are trying to track down why your computer is running so slooowwwly, try using this simple DOS command to uncover a possible problem."
• Yahoo Mail Innovates, Gmail Stagnates"Less than two years after their beta release, Yahoo Mail has begun rolling out of beta after releasing an onslaught of innovative feature improvements along the way."
• Turn Your Windows PC into a Media Center Powerhouse On the Cheap"If you've purchased a new Windows computer in the past few years that's running Windows Media Center Edition or Vista Home Premium or Ultimate and you aren't taking advantage of its baked-in DVR Media Center software, it's time we change that."
• Top 10 Wikipedia Tricks"Without a doubt, Wikipedia is one of the most useful and amazing sources of information on the internet--but chances are you aren't using it to its full potential."
• Install Third-Party Applications on Your iPhone"In less than two-months time, a persistent and merry band of iPhone hackers have been pushing out application after killer application for the iPhone, and hacking your iPhone to install those applications has become dead simple."
• Best Free Software to Unlock Your Favorite Hardware"It sucks that your favourite gadgets have more functionality than their default software exposes, but it rules that several software applications are built to unlock that potential for free."
• Top 10 Ways to Put Your Remote Server to Good Use"An always-on server can come in all kinds of handy for running automated tasks, syncing your data, remote controlling downloads and acting as a proxy."
• Soup Up Your Xbox Media Center"So you've turned your classic Xbox into a full-blown media centre (or you're thinking about it) and now you want to add the finishing touches--like games, album art and streaming video--to your setup."

If you're looking for new and exciting ways to share your pics with friends and family, you'll want to check out Animoto, a site that lets you create professional looking video slideshows. You can import your pictures from online or from your computer, as well as choose music, which images to feature, and lots more. A full-length video costs a measly $3 or you can buy an all-access pass which gives you unlimited full-length videos for an entire year for $30; however, I found that the 30 second shorties served my purposes just fine.

Launchy lovers and early adopters might want to check out Launchy 2.0 alpha and help in the testing process. Thanks Dan!

It's only when you've scheduled automatic tasks for your computer to do for you that you have true reign over your silicon gadget minions. Weblog Of Zen and Computing lists what jobs your computer can do for you, like spam filtering, Google Alerts, and image batch resizing. I'd add backup, downloads, hard drive cleaning and spyware/virus scanning to the list. What do you automate on your computer? Do tell.

If you're of the political persuasion, you've probably already come across GetUp, the online-based grassroots activist group that's put on some pretty high profile campaigns around specific issues like the David Hicks detention, as well as larger issues like climate change, and the federal government's plans for Iraq.
With a federal election looming, GetUp is taking the campaign offline and into local communities through GetTogethers.
If GetUp's grassroots, leftleaning politics speak to you and you've been wondering how you might get involved in changing the outcome of the next Federal Election, why not check out one of their election planning meetings which are happening around the country. Details are here - Melbourne's GetTogether is happening tonight.

A disclaimer, if one is needed: Yes, I'm a GetUp volunteer. :)