Using an airport shuttle from airport to resort is the most popular option. Both airport shuttle and shared transfers work by you paying for your seat on a particular route. You then arrive and get on the next airport shuttle to your destination.
On a shared transfer from the airport, you share your transfer (!) with other passengers that arrive on or around the same time that are going to the same destination. Most Shared Transfers are 8/9 passenger minibuses.
You also have another option - a scheduled airport shuttle or shared transfer. This allows you to select a departure time that best suits you. So if other friends are arriving 40 minutes later than you you can choose to wait and meet them. You simply have to book the time, then follow the instructions on your voucher to find the driver / company for the transfer. Usually if you miss the run - provided it was not the last of the day and then next one is not full, you will be allowed to board the next service. This only operates between popular desintation from the airport mind.
If you fancy a bit more privacy or want to just have a bit more room to spread out, why not consider private transfers or airport taxis to your resort?