they are tricky to work out! My suggestion is to give each a profile. What is their personality? characteristics? positives / negatives?
Thirteen's court card interpretations are really good on here -
http://www.aeclectic.net/tarot/learn/meanings/
Joan Bunning's take on them is good too -
http://www.learntarot.com/cards.htm she also has lessons about them on her site.
If you can make a profile in your head for each, it greatly helps! they can represent a person or a situation, so make sure you can find your own take on both. The figure in the card gives a lot of clues about their personality, their expression on their face, what they are doing (some Kings sit face on, some Knights ride really fast rushing around, some are not moving). You could even make stories up about them based on their invented profiles. You can even give them a back story, how did they get to that position in the card?
In my head I have a sort of "they like, they don't like" for each of them. Like the Queen and King of Swords do not like romance or expressing their feelings easily, but they love logical and intelligent discussions.
I learnt reversals for them as well which is normally an extreme version of the upright. As well as the reversals, each character has a negative, something missing or is their weak area. It's fun to work them out! I did look at a lot of different author's ideas about them to decide on my profiles for them but there is a lot of clues in the card pictures
Griz's guide is really good! there is also a hierarchy
Pages are at the bottom. If this comes up for a person it might show they are inexperienced, naive or child like in the area of the spread. They could be literal children or the characteristics. They represent beginnings and messages sometimes.
Knights are next. They are different to the beginning but are more action orientated! Page is the start, Knight is the teenager and the action and progress. They have a little maturity and know how to get what they want or work towards it. The Pages just have the beginning of an idea.
Queens have reached a level of maturity, they sit next to their King. They are more inward facing and have a feminine energy and caring. Just like often in real life and in history, they do not have the dominant power of the King but they have influence and gentle persuasion. Perhaps they might even be the person with the real power even though it seems they are the loved one of the King.
Kings are the top, they are the most mature and wise from experience. They are fully formed people after years. They have a masculine energy and are dominant.
I liked this take on them from the blogger biddytarot -
Pages conceive ideas, Knights act upon ideas, Queens nurture ideas and now Kings develop those ideas to an established and stable state