Share 'Whats In Your Bag....BESIDES discs.'

Was curious what things people find useful/helpful/neccesary on the course, and tips or tricks to make a round smoother/more enjoyable. So whats in your bag besides discs and give us your trade secrets and tips for casual or tourney play, disc retrieval from trees, water, dogs, ect, whatever- (basically any good idea you came up with yourself or something you saw someone else have, use, or do, t…