Yes, we do lie to ourselves many times in a day, the good thing about this is, most of us tell small little lies, coming late to the office and blaming the traffic, taking a day off and blaming the fever and headahce, telling a host that food is very good while the truth is it would be horrible.
Pleasing the boss, spouse or seniors by giving the answer thye want to hear rather than the truth because we do not want to upset these people. There are many examples like this which most us do it, I'm also guility of doing some of it.
The more worrying kind of lies is people cheating on a spouse and lying to themselves that it's acceptable. People dipping into family's hard earned money for their addictions (drug, alcohol, gambling) and lying to themselves that it's OK.
The last kind is the kind of lies that I like, we know that we can't make it in time for our exams or flights but we lie to ourselves and give it a good try. We would be under prepared for an exam or an interview or a home function but we lie to ourselves that we can do it and continue on. These kind of lies are one that we say with the 'Hope' that we can succeed.