Breaks

It is important to take breaks when doing the Pomodoro technique. Working takes away out mental energy and it is important to replenish it. The author of the Pomodoro Technique Illustrated makes four Pomodori a set and a set break is about 15 - 30 mins. Even thoug the length of a Pomodoro and the break can be varied. The original technique advocates a 25-minute slot of focused work followed by a 5-minute break.

Planning

Planning is an important step to get things done. By writing down your plans for a day, it helps you to get focused. The Pomodoro technique requires a planning stage every morning. During the planning stage, you choose the highest priority activities from your Activity Inventory sheet and put them into your To Do Today sheet.

In the Activity Inventory sheet, you don't write what to do, but write down how things will be when they are done. For example:

1. Living room tidy
2. Cookbook ordered

So these reminds you about the end results you want to achieve.

Daily plans can help with setting more refined goals whereas I think having weekly and monthly plans allows you to set larger goals.

Reference:
Pomodoro Technique Illustrated http://pragprog.com/book/snfocus/pomodoro-technique-illustrated