Effective Communication Skills
Effective general communication is by getting your point across so people can know what you're trying to say and simplifying things to break it down to its point. It's good to talk clear and simplify what you're saying so the other people doesn't have to ask to repeat what you said, not everyone likes to hear "Can you repeat that please?" after everything said. It's also good to make sure you don't talk super fast so people can understand you easier. Ineffective communication could be misheard and taken to offence and possibly worse.
If you're sad, angry, or just not happy you could often bring other people around you down and affect them with your negativity, you could also try and just get things over with and have a negative reputation for yourself, others, clients, customers, and a company.
If you don't have good written communication skills it could often impact the receiver's ability to read or even understand what you've sent. You need to make sure you're staying on topic and getting your point across and that your grammar and spelling are of high standards. If your email, CV or message is all sloppy like "hey wuu2 2day" or putting emoticons on emails to people / employers might not even look twice at your email, CV or text.
If you don't have good written communication skills and you're writing a email to your boss or client for your company, it could possibly damage your reputation.
Barriers for Communication
Effective General Communication Barriers
To overcome this barrier make sure you keep your instructions, tasks or points clear with good spelling and grammar and possibly even repeat what you've said or send them an email with written instructions.
Effective Interpersonal Communication Barriers
To overcome this barrier, make sure you stay connected to yourself and believe in yourself, be a non-judgmental person and just accept yourself and others around you no matter what. Clear your mind when it comes to things you're nervous about or not confident about and just take it as it comes. If you're reading something make sure you know what you're reading and know what the words mean / are pronounced.
Effective Written Communication Barriers
To overcome this barrier make sure your spelling is all correct and your grammar is too, else the person reading it might have no idea what is being said. It's never a good idea not to spell check emails or CVs before you send them, if the company you applied for has seen the bad spelling or grammar mistakes, they might just throw your email or CV away and won't even get back to you and tell you why.