If there is one thing that we're certain of in life, it's getting older and going through the aging process. As we get older, our retirement gets closer, so if you're soon to give up work and enjoy your golden years, getting everything in order is key for enjoying your retirement. Whether you want to take up a new hobby, be more sociable, or even travel the globe, here are some tips on how to have a happy, healthy, and fulfilling retirement.