An HDMI cable connection is the most reliable and highest quality.
For convince, wireless casting is great. Aggiez03 pointed out that chrome has that ability. So do most newer laptops.
Every once in a while, casting has a few hiccups or slight delay. Casting works really great for slides and presentations. Whether or not you share your display wirelessly or with an HDMI make sure your screen saver is off.
Nothing like being hitting your rhythm in a presentation and the screen saver appears.
Here is a link to a 30 second tutorial.
Cast To Samsung TV