If you save and invest for decades, you’d like to know you can retire without financial worries. Nonetheless, you still have to be aware of some threats to a comfortable retirement — and how to respond to them.

These threats include:

• Inflation – Inflation has been high recently, but even a mild inflation rate can seriously erode your purchasing power. In fact, with just a 3% inflation rate, your expenses could double in about 25 years — and your retirement could easily last that long. ...