A brother asked me a question which reminded me of something I've been wanting to post for a while now:
Brothers, Imams, Amirs, Shaykhs: when you marry a couple, your job is more than just reciting some ayat, facilitating the offer and acceptance, and making some du'a! The age we live in requires much more of you!
 Many of the couples who come before you do not actually know each other & may be extremely incompatible. Many of them have become acquainted on internet-based social media such as Facebook. Many of them are sexually excited (because of their extensive najwa (private conversations i.e. inboxes)) and are therefore blinded to the fact that they may be more incompatible than they would like to admit. You have to look for this and be honest enough to tell them, even if they reject what you say and move on to the next person who will be willing to marry them without all of your "red-tape".
 Taqwa is disappearing from the hearts of people and many of them are more concerned with appearing Islamic rather than actually living Islam. With this is mind many people will come to you for marriage who should not be getting married at all. This includes (a) couples who have already been divorced by three consecutive pronouncements, (b) women who are still in iddah from a previous marriage, (c) women still married (no divorce), (d) women who do not have the knowledge or approval of their waliy & may pretend not to have one, etc... It is for this reason that you must ask very specific questions and ask for explanations regarding any inconsistencies. The first red-flag is the one who does not belong to any community. But even more of a red-flag, is the ones who come to you and they already belong to a community but can not get married there! The reason for this is obvious! The people who know them also know that they should not be married!
 Maal (or wealth) is one of the greatest fitnahs to afflict this Ummah as it has been related from our beloved Prophet, may Allah bless him and grant him peace. Our marriages have not been spared from this fitnah. Make sure the sisters know their rights regarding financial maintenance, regardless if she is poor or well-off. Make sure the brothers know their financial obligations! Many times couples will come to you after already having made financial arrangements. In many cases, the sister would have agreed to take care of herself for some period of time or until the brother "gets on his feet". In other words, she gives up her right to be housed, clothed and fed by her future husband. There is nothing wrong with this, but experience has taught us something about this type of arrangement. Do not let them get away with some type of vague & verbal agreement such as this; because as soon as they get into an argument or there is talk of a divorce you will witness from them 2 different accounts about what the original financial agreement was! Draft a contract which is very specific regarding this financial agreement and have them both sign it! Make sure each of them has a copy & keep one for your records! This agreement should have time limitations, specific dollar amounts and a course of action if the contract is not fulfilled!
I have only mentioned a few issues which seem to be prevalent in this age. It was not my intention to be exhaustive. May Allah use us to make marriage easier and more desirable than zina (fornication & adultery) regardless of the obstacles!