Here's a couple I've been playing with:

* RSS to email: Use this a lot for important but infrequently updated feeds

* Email me whenever someone posts something for free in my city on Craigslist (fun but had to disable this after a couple of days--useful for more specific searches)

* Push screenshots from my iPhone to Dropbox - no more emailing screenshots to myself

* Push photos from the "Flickr" album on my iPhone to my Flickr account

* Email Instagram photos to my mom

+1 for screenshots to Dropbox. That's amazingly useful, thanks for the idea!

You can do this with the dropbox app on android at least.

The iOS Dropbox app has an option that automatically copies new pictures from the Camera Roll into your dropbox.

This works with any app that dumps things into the camera roll: screen shots, PhotoSynth, actual camera pictures, ...

My best use has been to set up email notifications for various "slow shopping" tasks on Craigslist and eBay. This is super handy when looking for semi-rare or infrequently posted items (e.g. specific out-of-print books), or great deals on items where the seller has priced to move (e.g. email me about craigslist leather couches selling for under $200, dell ultrasharp monitors under $100, etc). If you're not in a hurry to buy stuff, it's a great way to save money.

Yes! This strategy netted me my Aeron chair for 200$

It also proved to me that the following is true about purchasing a used Aeron chair in San Diego:

    limit   -  expected ETA
    > 500$  -  1-2 days
    400-500 -  1-1.5 weeks
    300-400 -  2-4 weeks
    < 300   -  1-2 years

I think it's one of the more popular, but Feedly -> Pocket is brilliant. I used to spend ages in the morning reading through feeds, now I spend a few minutes flipping through Feedly, saving anything I want. When I want to read something later in the day I just open up Pocket and everything's there.

Here are my current favorite IFTTT recipes for my phone:

Screenshots to Dropbox - Add my iPhone screenshots to a Dropbox folder Post Instagram pictures

Voicemail to Soundcloud - Leave a voicemail for IFTTT and post it to Soundcloud as a private track

Siri to Evernote - Create a Reminder list "Evernote". Use Siri to add a new reminder to the "Evernote" list. Append the reminder as a note to an Evernote notebook.

Not particularly cool but one thing I use it for it saving photos I post to Instagram to my Dropbox. Another use case was posting Instagram photos to a Facebook page. I had the page under a separate account from my personal one which made using Instagram's native integration a pain (it kept trying to pair with my Facebook app which was logged into my personal account).

I also have recipes for my instagrams (and the instagrams of a few friends) to be put in a special folder in my Dropbox. Then (so I don't waste space on my Dropbox) I have a cron that periodically moves them into a local folder on my Mac. And I then occasionally load up that folder as the screen saver photos on my Apple TV. Unfortunately, I haven't figured out how to make that last step automatic.

The appletv Flickr screensaver is really very nice. That might do the trick.

I wrote up a whole post on how I use Evernote and IFTTT. My favorite is the monthly screenshots of my Last.FM listening history.

http://aaronfrancis.com/blog/2013/2/26/how-i-use-evernote-an...

I developed an automatic image downloader from Reddit to Dropbox: https://ifttt.com/recipes/74285