Here is an interesting exercise. Whenever, you have a 'should' statement, see if you can change it to a 'can' statement, and notice being more empowered. Examples:
Not, I should be grateful. Instead, I can be grateful! [To clarify, I mean that being grateful is something that will make you feel good. As an analogy, if you have tasty cookies lying around the house, you will say to yourself: "well, I can certainly get cookie."]
Not, I should leave a generous tip. Instead, I can leave a generous tip! [As in, you can leave a generous tip and feel good about it.]
Not, I should donate to charity. Instead, I can donate to charity!
Not, I should loosen-up sometimes. Instead, I can loosen-up sometimes!
Not, I should keep in touch with old friends. Instead, I can keep in touch with old friends!
Not, I should learn to program. Instead, I can learn to program!
Not, I should eat healthy. Instead, I can eat healthy!
The general pattern here is that, instead of making the activity a moral duty, you can make it something fulfilling which you choose to do because of its benefits.
For 'should not' statements you can substitute: 'I choose not to.' One example (you can make up more):
Not, I should not eat refined sugar. Instead, I choose not to eat refined sugar.
I'm sure that this procedure doesn't always work and you can generate counterexamples. I have not done them here. Please share your examples (counterexamples).
I'm not saying that ordinary usages of the word "should" are statements of morality, rather the opposite: statements of morality can be translated into ordinary usage, and if they can't they probably aren't coherent statements.
"I am morally obliged to treat this person's injury" "Why?" "Because it would stop their suffering"
Perhaps we prefer to call it a moral statement when it's about other people's utility functions, rather than our own. Then again, we usually don't feel morally obliged to cater to others' preferences except to the extent that we have a preference of our own for their preferences to be satisfied, which, thankfully, most people do.