How to glamourise yourself for a night out without being able to go home and change

I have often found that during the course of an afternoon, a friend will call and want to meet up for drinks and or dinner straight after work and this used to traumatise me because being the perfectionist fashionista I am, I hate to go anywhere without feeling like I am appropriately "glammed up" for the occasion. And then one day I thought, "Well I actually can get appropriately glammed up for an occasion without going home to change - all I have to do is plan in advance, in case". By this I mean, always having key items in a bag in your car that will glam up the outfit that you're wearing that specific day "just in case".  An example can be seen in the picture I have added. A simple tan coloured dress which I would be wearing with flat tan pumps during the day can easily be glammed up by 3 key items namely killer heels, a killer evening bag and killer accessories, all of which take up next to no space in your car and won't require too much planning. A quick and easy way to always look good no matter where you are, because lets face it, you never know who you're going to bump into!!!