Over the years I have tried every type of wall anchor and toggle bolts on the market. The best product I have come across is the Toggler Hollow Wall Anchor. They are quick and easy to install and very strong. They work equally well in both drywall and plaster walls. These anchors are also translucent (many other anchors are color coded to designate size) which is nice if your object is small and doesn’t cover the anchor completely, such as a coat hook. You can get a sample kit from their website.