I've learned my lesson too. Years of high heels, no support sandles, it messed up my feet. I bought crocks, those ugly things I swore I'd never wear, with the idea of just wearing them in the house as slippers, and they were so comfortable I was shocked. I've been wearing them for 2 yrs now, no more foot problem. I also have a pair for walking. I don't have the nerve to wear them on a casual basis like grocery shopping or running errands.
Other than that, for work or casual, its all about comfort, no heels more than an inch or so, its not worth it. How do some of these ladies walk in spike boots especially in the winter? I'd be flat on my buttt! Speaking of which, it was so difficult to find winter boots for comfort a little dressy and not spiked. I finally saw a pair on the shopping channel, bought two pairs, one in black and one in brown.