I do not lie. Ever.
If a situation or a question is particularly awkward, I may decline to answer. But when I do give answers they are always truthful.
When my children were growing up, I told them they could always believe that every word I would ever say to them would be true and trustworthy, but that I would never lie for them. No fibbing to teachers about missed homework or late arrival at lessons.
Tell one lie, I told them, just one lie, and nobody in future will ever know when you are trustworthy and when you are lying. Stick to the truth like glue, and you will be known as reliable and trusted.