The cheapest way to improve your slippery, easy-to-lose Apple TV remote is to add a case. You read that right: a case for your remote.
Kutop protective silicone cover
At $8, this Kutop case is one of the cheaper options. It's made of a durable silicone, has a honeycomb back, making it easy to hold, and an integrated lanyard so you can easily hang it up. We picked it up in green so it would be easy to spot in a darkened home theater, but it's available in plenty of other colors. This case is also sold under the for $1 more, so it's not unique to Kutop.