Happiness is something you decide on ahead of time.
Whether I like my room or not doesn't depend on how the furniture is arranged ... it's how I arrange my mind. I already decided to love it. 'It's a decision I make every morning when I wake up. I have a choice; I can spend the day in bed recounting the difficulty I have with the parts of my body that no longer work, or get out of bed and be thankful for the ones that do.
Each day is a gift, and as long as my eyes open, I'll focus on the new day and all the happy memories I've stored away.. Just for this time in my life.
Old age is like a bank account. You withdraw from what you've put in.
So, my advice to you would be to deposit a lot of happiness in the bank account of memories!