If they have minimum balance requirements make sure you don't go below them. For example wanting to save $1,000 to buy furniture. When the bill comes in, if you empty the account, they might close the account. To prevent that from happening keep enough to meet the minimum balance.

Make sure that you can transfer the funds automatically from your main account to the other accounts without having to wait days. Test this by opening one of these accounts, then move money in and out of the account. If it works the way you like then setup the rest.

In the United States if the interest earned is <$10 they don't have to send you 1099-INT, but you still have to include the income on your taxes.

Signup for electronic statements so that you will save multiple trees each year.

If they have minimum balance requirements make sure you don't go below them. For example wanting to save $1,000 to buy furniture. When the bill comes in, if you empty the account, they might close the account. To prevent that from happening keep enough to meet the minimum balance.

Make sure that you can transfer the funds automatically from your main account to the other accounts without having to wait days. Test this by opening one of these accounts, then move money in and out of the account. If it works the way you like then setup the rest.

In the United States if the interest earned is less than $10 they don't have to send you 1099-INT, but you still have to include the income on your taxes.

Signup for electronic statements so that you will save multiple trees each year.