Shades are the same as ''Sun glasses'' right? The problem with that is, it can look suspicious when using in shops. Instead try to replace it with (Reading glasses, or some other fashion glasses that looks more normal to use inside a shop)
Baseball cap is good. What you also can do is: When you go into a shop (Take your mobile phone out of your pocket and then look on the display pretending to read a text message, then Quickly walk in the shop that way) So the camera, that catch you entering shop will just see your CAP. You usally see a TV screen of the camera when you go into a shop.
If you are white, you could try tanning/using some kind of cream to look darker/brown in the skin.
You could also try to appear fat by leaning back, pulling your stomach out. and wear clothes that makes you look fat (or hard to see your weight) If its cold in your country, you could wear alot of clothes a jacket.
Growing a beard, moustache, Long and colored hair, are also things that could help a bit.
Also remember to change your cap/clothes sometimes so people wont recognize you too easy if you go back to same shopping malls etc..
