Simply log in to your account and go to 'My Account' > 'Responsible Gaming' > Time Out'.
Select a period:
24 hours
7 days
1 month
2 months
3 months
Once you have chosen, click 'Apply' to complete the process.
Please note that once your account has been set for a time out, it cannot be re-opened before the time out period is over. You will also not be able to open a new account to play instead if your original account is on time out.