The registry is either a super fun or a super tiring part of the wedding planning process. Going to a big box store and scanning everything you want with scanner guns is fun but couples can find themselves overwhelmed with the possibilities, the prices, and the daunting process of choosing what will actually be useful. Take time together as a couple before heading out to register and research the different options. Consider return and exchange policies, shipping costs, ease of access for guests, etc. Consider registering at multiple stores - perhaps your favorite store, a big box store where out of town relatives will find it easy to shop, and an online store like Amazon with a great return policy.
Make a list with your significant other of all things you will need to start your life together. Try to have a good amount of gifts in every price point to encourage friends and family to shop on your registry. Aim to have 1-2 gifts per invitation that you are sending out.