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. You may also list things that you no longer want in your life and are happy to give away to the world. You may list as many of things as you want - as long as you remember what they are. List the items that you have chosen one by one and as you list each one, throw a crumb of bread into the water, wishing the fish bonne appetite and sending your memories back from they came.