remember what you said

"Always tell the truth. That way, you don't have to remember what you said."

There are times that we lie for a reason. And sometimes even though we dont like it, lying is easier than telling the truth. Whatever our intention is... still its lying.
When we lie, we have to be very good so not to spoil the plan. Good or bad, let's face it. Its not easy to lie. Why? You have to invent something and make other people believe that it is true. You have to look believable. You should watch out for your words... your facial expression and the way you deliver your lies. You should also have a good memory and presence of mind. The problem is, there are times when reality interferes and make lying a little bit complicated. Its hard to be consistent.
So it would be better to tell the truth as much as possible. In that way, you don't have to have a good memory and fear that one day the truth will come out.