Write out a short-list of the simple things that give you pleasure.
Keep them in the front of your consciousness and make sure you engage with them at least a few times a week. As you do these things, stay present and mindful of the joy they bring you.
For example, I love eating a fresh juicy nectarine on a summer’s afternoon, and meditating in the morning after a fresh brewed cup of tea, and taking a walk with my husband and window-shopping. What are some of your simple things?