Some archers never learn from their technical mistakes. Don't be one of them. Make a promise to yourself to make notes immediately during competition if anything is out of place, missing, or otherwise needs attention.
However, gear preparation is needless to say essential. You will of course be certain your bow is tuned, your sight marks are accurate and you have at least the basic back-up equipment, is vital. A modern recurve or compound bow is highly unlikely to let you down, but having spare essentials in case of an emergency, such as a back-up string, arrow rest, and tab (if you are a recurver) are logical, and relatively inexpensive items.
For the compounder, the main items, your bow and your release aid, are supremely reliable, but be sure your…