Lifehacks

To Do/Project Management
Asana: Simple task and project management built on the concept of flow.
Email
Boomerang: Schedule emails to be sent later or setup reminders.
Rapportive: View LinkedIn/Facebook/Twitter/Other Profiles all within gmail. Not only does this save time, it helps keep you in the know when communicating via email.
Productivity
Google Chrome: Although, I am still hoping Mozilla Firefox gets to be a lot better again — Google Chrome is fast, easy-to-use, efficient and has tons of apps that you can add on.
Evernote & Evernote Google Chrome Clip: The best way to organize all of your notes, paperwork, and memories.
Dropbox: Keeps all your files available anywhere and between all your computers.
Fujitsu Scansnap: This amazing little machine has more than paid for itself. I am almost 100% paperless and this little scanner scans perfectly into Evernote like a charm.
Pinboard: A clean and friendly interface for saving bookmarks.
+IFTTT: IF This Then That. This convient web app connects all your other apps. For example, if you take a picture on Instragram it will automatically save it to Evernote.
Reading
Instapaper: If you are anything like me, you are always reading articles online and 10 minutes online can lead you to find hundreds of interesting websites. Sign-up (for free) and  install (drag and drop) the bookmarklet. Whenever you find an interesting article that you want to read, then Instapaper-it. Later, you can go to Instapaper.com and read the article or  go to the iPhone app and read your articles.
Kindle: Although I still love reading books in paper, I love having my books at my finger tips and being able to highlight quotes and passages that I find interesting.
Meditation
Insight Meditation App: This app is perfect for meditating. It has a lot of nice options for mindfulness bells and it will ring at the beginning and end of your meditation.
Service
ServiceSpace.org: ServiceSpace is the best community on the Internet. This completely volunteer run organization (which I am a part of), provides you with a forum to share inspiration, random acts of kindness and a nice way to create an online and offline community that is focused on doing good.
KarmaTube: KarmaTube (from ServiceSpace) curates inspirational videos and gives you specific actions on how take advantage of them. (Disclaimer: I help do the write-ups for the videos).
iJourney.org: Inspirational, thought provoking and spiritual passages that will provide the perfect conversation topic for a meditation group or just with your friends and family.
Photography
Instagram: No wonder Facebook bought this for $1B its fun and addictive. I love taking pictures with it and sending them around.
Google Picasa: I prefer Google Picasa to iPhoto or any other photo management app because it enables me to maintain my photos based on the folders on my computer and it enables me to sync easily with Google Web albums!
Collaboration
Join.me: Need to share your screen in two seconds? Go here.
Balsamiq: I love the companies culture and I love the software they have developed for creating mock-ups.
Learning
Google.com: The most game changing web application that has changed education: Google.com. Google let’s you find the answer to whatever question you may have and let’s you go down the rabbit hole of your curiosity.
Khan Academy: Sal Khan started making videos for his nephew in India and they came extremely popular. Now, his website is Gates backed, and he is changing how people around the world can learn about anything.
Blogs
ZenHabits.net: I have been reading this blog for almost four years. The blog focusses on simplicity and mindfulness. The writing is simple and the website is to the point.
The Art of Non Conformity: This blog depicts the journey of one man to visit every country in the world, and he provides some amazing insights on life.
James Altutcher: As a writer, James bleeds the truth — he is brutally honest about all of his experiences and provides practical and actionable ideas.
Travel
+ Rolf Potts: Rolf Potts is absolutely my favorite travel writer. His writing is thought provoking and forces you to look at travel, work and life in different ways.
RickSteves: Rick Steves got me through all of Europe. His small business is honest and provides good and solid guides and other travel related products.