This year I came up with a cute little pouch to keep the important stuff in (keys, phone, money, cards) that won't fall out of my pocket or make me look ridiculous wearing.
I made it using a pair of old jeans that had worn out. The front has a clear vinyl window that allows me to still see my phone while it's inside. The nice thing about vinyl is that you can still use touchscreens through it. The other side has a small zipper compartment that is big enough to hold cash, cards and keys secure. The small clip allows me to attach it to my belt or belt loop and then stick the whole ting in my pocket. no more worries about losing my stuff.