We need to constantly be reminded of the sinful nature we have to keep us tolerant of others' faults.
I don't spend every day asking to be forgiven...just when the Holy Spirit convicts me of something that needs to be addressed to God. If you worry too much about asking for forgiveness for every little thing, you become pretty self-centered.
I just enjoy the mercies of God most of the time. And always try to act mercifully to others. After all, if God forgives me past, present and future, who am I to withhold it from others.
J.