Remember The Milk is, without a doubt, one of the most powerful task management solutions on the market, and its Android app is pure awesomeness. It is extremely polished, and I rely on it reminding me about my tasks, including various Android Police business, every day.
One feature that the RTM app has been lacking is push syncing support, instead making us select a potentially battery-killing polling interval (mine was set to every hour). As I've found out from my own observations, frequent sync is really devastating to the battery life, and should be avoided as much as possible. To address that, today that the company released an update version 1.4 of the Android client, codenamed "Rachael," which introduced what they've described as the "magical push syncing awesomeness," among other things.