Travel is one of the things that I have done, every year since I retired, as have my friends. Travelling is a major activity, which for some of my friends has included adventure travel to exotic locations. Travelling may be part of this first phase for you and should be seen as a chance to grow your mind. Also, this is a phase when you can exercise and participate in sports at a much greater intensity level than prior to retirement.
Related to health conditions, retirees may need to make decisions concerning their housing. They may have to decide if they need to move to a house that is more physically manageable fix up their home, or to an assisted living facility in a retirement community. Given this concern, specially designed housing can be extremely helpful.
For the types of assistance needed during this phase, the family generally is the primary source of help, perhaps supplemented by others. Community and paid services for assistance may also be available.