Journalizing a transaction is recording it in chronological order in a general journal, a book where all economic events are recorded. Remember that a transaction will affect at minimum two different accounts and that each entry or record of transaction must have an account that is debited and an account that is credited and the debit side must equal the credit side.
STEP 1. Find the accounts affected. There must be at least 2 accounts.
STEP 2. Identify their respective category or classification: Assets, Liabilities, OE, and OE subcategories: Revenue, Expenses
STEP 3. Determine if the accounts increase or decrease
STEP 4. Apply the debit credit rule
STEP 5. Make sure the debit side equals the credit side
Navigate to this site to see journal examples. http://www.accountingverse.com/accounting-basics/journal-entry-examples.html
Here is a great video on how to journalize transactions using the double entry accounting method.