One option not mentioned yet are using one of the several Bitcoin debit cards. The options available to you depend first on what country you live in. Then there are two different types of cards:

1) Direct withdrawal of bitcoin from your wallet for the fiat based purchases you make, or

2) Prepaid loaded debit cards, which require you to sell Bitcoin for fiat to load the card for fiat purchases.

Bith are easy ways to use your bitcoin as currency.