A diode voltage-dropping arrangement is much better than resistors. Resistors are power-consuming devices, and reduce voltage based on current flow through them, which also varies based on temperature. A diode is a better solution, as reverse-biased, it consistently "reduces" by .7v across it's P/N junction, up to the full amperage rating of the diode, and regardless (essentially) of the input source voltage. It also will be nearly unaffected by temperatures (within it's rating), and although it isn't regulating the output voltage (neither is a resistor), if the source voltage is relatively stable, then the output after the diode is equally stable and consistent with it's .7v drop.

All in what you want to wire in there.

After using regulators, I will stay with diodes.