Here's another helpful article on generating a paycheck from your retirement accounts from Morningstar. 

Sequence of Withdrawals
The issue of how to sequence your withdrawals in retirement is a particularly important one. It almost always involves careful tax planning. It's not uncommon for retirees to have many different streams of income (pensions, Social Security, nonqualified distributions, etc.) and pools of assets (taxable accounts, retirement accounts, etc.).

• Set up a cash pool that will cover 2-5 years' worth of expenses. Take your regular distributions from this pool and periodically fill it up.
• As a general rule, make withdrawals from taxable assets before tax-deferred assets. If you have a particularly large IRA, there may be exceptions.
• If you're in your late 50s and must tap a retirement account, take distributions from your company retirement plan instead of your IRA.
• At retirement, consider taking out company stock held in a retirement plan (not rolling it over) to potentially convert ordinary income tax to capital gains tax.
• Use substantially equal periodic payments from IRAs to avoid the 10% early withdrawal penalty.
• Tap your Roth IRA last.