Utilize on-line BillPay through your bank.
BillPay is free through your bank. Why take the time to buy envelopes and stamps and then have to address the envelope and then physically drop it in a mailbox every time you pay a bill?
BillPay will save you money on stamps (because the bank is mailing the check) and on purchasing paper checks.
Also, it keeps you in much closer contact with your money as you can decide when to release the money and when it is to arrive