I love flip flops. With a pair of white trousers... I reckon things are looking on the up as soon as you step outside.
I went on a family holiday when I was 9 or 10 and while walking to the beach I found a size 10/11 pair of flip flops in the verge and I wore them for the whole time I was there. They were enormous.
I also found a stolen pair of Doc Martens sandals when in my 30's that I wore for a while, and I now get given a vast array of Hotel freebie slippers to wear. But, I'm often found in a pair of green plastic Ikea gardening sandals, that yes, I wear to the pub.