1. Lying
What about white lies? If you are tempted to lie in order to protect someone's feelings, consider that assertive communication goes a long way, since many white lies are based on opinions, not facts. If someone asks “Does this dress make me look fat?” any response that you give is just your opinion, so there is no need to be offensive. You can choose to respond assertively in a way which protects someone's feelings, such as, “I think the other dress is the most flattering, but that is just my opinion.”
2. Gossiping
Gossip is perceived as something to be avoided in many cultures. There is an Irish saying “Who gossips with you, will gossip of you.” This is true because a person who gossips clearly has no compunction against spreading private information around. Spreading malicious gossip about someone’s private affairs can harm the person's reputation.
If you gossip habitually, others may think that you are untrustowrthy, and it can affect their perception of your character. I have also noticed that I just feel bad when engaging in idle chatter or gossip about other people, so I have tried to stop doing it. I wouldn’t want other people talking about my personal life, so I don’t talk about theirs.
3. Being Aggressive
Assertive behavior is always preferable to aggressive behavior because it allows you to assert your own needs in a way that protects the self esteem of other people. Assertive people communicate well with others while remaining clam in potentially stressful situations. They also have strong personal boundaries, and they don't allow others to treat them poorly. They communicate their own needs and desires in a tactful and proactive way.
Acting assertively allows you to maintain integrity and character in your personal and professional interactions. Assertiveness can also help to prevent situations that could potentially turn aggressive or violent.
4. Cheating
People who cheat are generally selfish, disordered, or lacking in character in some way. Cheaters want a certain result or experience without having to put in hard work. They don't want to play by the rules or keep a vow or promise. Cheating often goes hand in hand with lying and manipulation.
You know that you are probably doing something unethical if you feel that you have to lie to hide your behavior, to get the upper hand, or to prevent your lack of character from being exposed.
Cheating can ruin your character whether you get caught or not. If you do get caught, it can ruin your life or career as well. It has been said that your character is defined by how you act when no one is watching. Having personal integrity means that you choose do the right thing, even if you know for sure that you won't get caught doing the wrong thing.