Sometimes the bride and groom will go to one shop and set aside items that they want as gifts. This makes it very simple. But you could also just use those as a guideline - for example, if they chose a vase, you could order a bunch of flowers to be sent to their house once a month for a while. If they like to travel, buy them a popular travel book or some items that would be useful for travelling. Wedding gifts are usually useful things that the cuople needs to set up their home.
Popular newlywed gifts these days include a wide range of items. Some are hand-blown glass sets, simple and lovely kitchen items, regular food or coffee subscriptions, picnic baskets and blankets, coffee machines, personalized picture frames or cheeseboards, or dish sets. But, to truly give the best gifts for newlyweds, you must really know the couple well and be able to determine what would be the most meaningful and significant to them. If you do not know this, ask someone who is the closest to them to find out what the best and most special gift would be.