Very often, the things we do, rather than the things we say, are what we remember most. Overlooking a body of fresh water, preferably with visible fish. In the case of emergencies, kitchen sinks or toilets will do. This is a rare Jewish event that demands the presence of nature - the hike is worth it. Tashlich is usually a social event, where everyone has plenty of time to chat and compare fashion and sins.
Hats are very good.
Just make sure they don't fall into the water. Bring as many bread crumbs as you want, either in a little napkin or just in your pockets. Prayer books are optional. Stand in a place where you can see the water and can have some privacy. Close your eyes and make a list in your head of at least five thing you've done over the past year that you are either unhappy about, regret, or wish never happened.