Three Essential Things to Track in Your Life

Income and expenses

• You should know how much money you make and how much money you spend on different things. 
• To track your income and expenses, you can use a spreadsheet or a personal finance application. Here are a few personal finance applications you can use:
• Quicken
• Mint
• Wesabe
• GnuCash

Time

• Have you ever had days where you wondered why you've accomplished so little? That's one reason why you need to track your time. You need to know where your time went.
• To track your time, you can use a timer and spreadsheet or use a dedicated time tracking application like Klok and RescueTime.

Habits

• Do you have a good habit that you want to build or a bad habit that you want to break?
• You can do it simply by taking notes of how many times you do the habit in a certain period of time.
• You can then see how your score is for that period of time. With good habit, the goal is to maximize the score while with bad habit the goal is to minimize it.