How to use Pomodoro Technique at work/home

According to wiki,the following are  the steps to use pomodoro technique

1. Decide on the task to be done
2. Set the pomodoro timer to n minutes (traditionally 25)
3. Work on the task until the timer rings; record with an x
4. Take a short break (3–5 minutes)
5. After four pomodoros, take a longer break (15–30 minutes)

Note :

       Before Starting pomodors for a day

1. Estimate number of pomodors a task takes to finish
2. Estimate number of tasks that can be finished in a day
3. Estimate number of pomodors that is possible in a day

       During pomodoros

1. Make note of internal( from you) and external (from others) interruptions in a notepad
2. Attend/ Resolve these interruption after your pomodoro in the day 
3. go out of your place during break