The type of exertion made in activity can be a factor in your breathlessness. Consider the energy needs of what you are doing; can I make this simpler, can I break it down into parts, can I use a piece of equipment to make it easier, can I take out the bending and reaching, can I sit whilst I do the job at hand?
The goal is not to stop being active but to change the way you do things in order to maintain your independence for as long as possible.