You don't have to.

Only record activities which you want to analyze.

If you want to manage your business hours, you don't have to record private activities.
If you are focusing on your private hours, there is no need to record your business hours.
If you are a student, you may only want to record homework hours.
Some people record sleeping or eating hours and some just don't.

The point is that

"The More Activities You Handle, The More Difficult It Gets."

Keep things simple and just keep going.

Even if you record only 10% of your time, still it helps you to get a good analysis.

NEOREX is a company with about 50 members established in 1987.
Headquarters is in Nagoya and Sales and Marketing office is in Tokyo, Japan.

We are a group of engineers and we've been working on various kinds of development since our establishment.

Our recent work is mainly in software development, but we also do hardware design and development.

Our current main product is a Work Force Management System called "Kintaimirai."

*Work Force Management System is a time management system used for replacing timecards.

Kintaimirai is a cloud system
and more than 70,000 people are punching their times everyday in Japan.
Customers are Prince Hotel (largest hotel group in Japan),
STIHL Japan office (world's largest chain saw maker),
IKEA Japan (world's largest furniture company) and more.

Kintaimirai
(Web site above is only in Japanese)

Currently available only for the iPhone family, means iPhone, iPod touch and iPad.

Record activities which you want to do more, and
activities which you want to do less, or
activities on which you spend more time than you think you should.

The secret is not to try to make a perfect Activity Set from the beginning.
Just start recording and add activities as they come up.
You can organize them later.

It's also helpful to take a look at sample Activity Sets, so visit the Activity Sets page as well.