Does anyone have advice for purchasing heels that don''t slip off when you walk in them? All of my shoes are slingbacks, which I love, but for some reason I can''t find other shoes that have heels that stay on. How do most women do it? I''ve tried on a lot of regular pumps and the d''orsay style, which are really cute, but I''m like a kid in my mom''s shoes trying to walk in most heels! I''m a size 8, and if there''s slippage I try a 7.5, which usually means pinched toes. I''m hoping to expand my shoe selection beyond Joan & David slingbacks.