What do I do if I lost my power stick that plugs into the tv. I have the remote.
What exactly do you mean by "power stick"? If you lost the actual Roku device that connects to the HDMI input on your TV then you'll need a new one. If you lost the USB power adapter then you can use any that can supply at least 1 Amp.
Spare remotes can usually be used with replacement roku device (IR remotes can't be used with sticks).
Or sell spare remote on eBay
@renojim is asking the right questiond.