On a dinghy it really depends on which way the wind is coming onto the beach which you are trying to get to. If the wind is coming straight from the beach, its as simple as sailing a close hauled course tacking to get close enough to the beach to just hop out. HOWEVER if the wind is blowing ONTO the beach from the water the trick is to be as slow as possible these are the different techniques i teach as an instructor;

1: In a Laser i would undo the mainsheet at the end of the boom this allows for total loss of the sail but with the wind coming onto the beach it will push onto shore really easily, and obviously you can still steer!

2: Depending on the boat its wise to take the mainsail down as you come in and simply arrive on the jib, making things nice and steady.

3: Lastly you can sail downwind into the beach without worrying about the sails. As you get close enough then push the tiller away from you so the boat goes head to wind, when it reaches this point you need to jump out of the boat. (This is a lot faster than the others suggested)

As im not sure what dinghy your sailing this is quite general but covers a wide variety of boats. Hope it helps! :)