Got a Kindle? Well then you really need this freebie in your life. Send to Kindle is a free series of apps and plugins that allow you to easily send documents, webpages and emails directly to your Kindle for reading at a later date.
I use the Google Chrome plugin and it's extremely effective. If you're come across an article and you don't have time to read it, simply press the button and next time your Kindle is online it will download. It's made cloud services such as Instapaper completely redundant for me. It really couldn't be easier to use.