Don't bother. If looking into people eyes freaks you out, or if it stops you being able to concentrate and hear what they are saying, then if society only feels comfortable when you look in eyes, you can fake it a bit. Most people give a strong smiling look straight into someone's eyes for about three second when they first walk up to each other or start to talk; or if they are shaking hands then they keep eye contact for as long as the hand shake, but after that they talk to the lips with only rare looks up at the eyes. This is respectful - the first blast of eye to eye contact says you are a friend, then watching lips says you are paying close attention and being a good listener. People who tell you you should look into their eyes more often probably already spent a whole conversation with you, waiting for that first blast of eye contact to tell them you are paying attention / telling the truth / in a good mood / whatever it is they are looking for. If you are still left feeling uncomfortable then as long as you are not standing too close to someone (so they can't work it out) try smiling at the bridge of their nose, or their eyebrows, instead. They might get the sensation that you are looking 'through them' if you do it too long, but its a handy trick for those first few seconds or for moments when you look back up.