To Do Log was featured (globally) by Android Market in September/October 2011 and was top featured productivity App.
✔ To Do Log
To Do log is a to-do list and "not to-do list" in one. You assign points (either negative or positive) to tasks; then work to get the highest score over time by both doing things you want to do and avoiding those you shouldn't do. You can use it both for things you want to do and those you don't (so it is idea for new year resolutions, health or diet plans etc).
✔ Quick and flexible recording
You can easily add new repeating or one off items, mark them as done and record past occurrences of items. You can also add notes with additional information (and edit them later).
✔ Graphs for analysis
Later you can view graphs showing when you get stuff done, when you are most likely to get distracted or do negative things. By learning this you can take action to better achieve your goals.
You can export and import your data to and from external storage/sd card
✔ Recent Update
I've recently updated To Do Log for Android 4.0 upwards; this is now the vast majority of devices. But older devices can still use the previous version of the App.
✔ What users think of the App:
"Great app. App works and looks great. I really like the point system and it allowed me to better hold myself responsible for my habits."
"Highly recommended... This is my favorite self-improvement app. It allows to you to track behaviors in real time and see rapid improvement. Simply brilliant."
Redesigned UI for recent Android devices. On Android 4.0 and above now uses custom themed action bar. Various other changes for 4.0+.