I'm about to hit 60 and have realised a couple of things.
Firstly, your looks DO change with age, no matter how hard you try to stop that, so acceptance is the first (very difficult) challenge!
Secondly, I think it's even more important to establish what styles, colours etc work for you and your figure. I have finally realised I need tailored, classic styles, as frills, flounces and droopy bits really work against me.
Thirdly, yes, I do need a bit of makeup everyday to look my best. Not loads, but some foundation, mascara and tinted lipbalm make all the difference.
Finally, a decent, easily styled haircut. I have mine very short - not because I think older women should, but because I know it suits my face. But if I leave it and don't run some product through it and spike it up a bit I look at least 60. With a bit of texture in it I could (so I'm told) pass for a good few years younger.
Oh, and finally, finally, smiling really helps lift those jowls and makes everyone look better. 