The Diamond Mine layout was one of my first layouts. It's a fairly easy layout, and pretty good for beginners. A good strategy is to focus on eliminating the tiles that cover more than one tile below them first. Try to leave tiles that are not blocking other tiles for later in the game. Also, try to hold off on using the wild cards for as long as you can. By the end of the game, you usually want to have as many wild cards available as possible. Also save your 'I' and 'A' tiles because 'I' and 'A' are one letter words and at the end of the game you may want to get rid of them without attaching them to other words. Another good strategy for the end game is to know all your 2 Letter Words.
Let me know if you have any suggestions.
Thanks for playing :-)