I will have a primary accounts for everyday use but also reserve accounts for emergencies — If you're like me they will come in very handy! (foreverroamingtheworld.com)
As an advisor, I strongly recommend that you have at least one year of income in your cash reserves account (emergency fund). (fedretire.net)
This method is different from the method discussed in 2 only in respect of reserve account. (answers.com)