Paying back personal debts / New Year’s resolutions

Many of us have borrowed sums of money from our friends at times of need and we’ve all heard the saying a friend in need is a friend indeed but what about the times when we borrowed money and haven’t paid it back? Or we are taking a long time to pay it back? If we are the loner, do we now have a different view of our friend that was a friend in need? Does it change our outlook on life at all or make us not like the person as much? My view is that it shouldn’t change our attitude towards that friend. One fellow I lent $200 to more than ten years ago finally paid up. I hadn’t given it much thought during that time if any. We were never close, but we served on the same team for a while which is why I lent him the $200 to begin with. Recently I have done the same with another friend-a little bit closer friend, but he too has lollygagged in paying me back, even after we agreed on a date which is now almost a month past for repayment. What methods do you use to get the “friend” to pay up?