Install bukkit
Just go to bukkit.org and download craft bukkit and install the plugins that you want
You go to BukkitDEV or Bukkit Plugin list. Then Download and take the .jar into the plugins Also, some come with folders so put the folder in the plugins folder aswell. *Note* You need a Bukkit server for this.
You drag it into the plugins folder. If you want plugins in your minecraft server use bukkit, not the vanilla minecraft server.
You can't... To make a server that can use plugins, you setup a Bukkit server from their website... it's not possible to put plugins on the Minecraft_Server.exe type servers (not currently anyway)
You need a server using Bukkit, and there are multiple plugins for it.
There are Bukkit plugins already available to do that on Bukkit Minecraft servers, but they haven't released any information on actually implementing that into the game.
Bukkit is an API (application program interface) that changes the way plugins interact with the minecraft program. Most server mods will use Bukkit instead of attempting to 'hook on' to the actual minecraft software.
Download the latest CraftBukkit server from bukkit.org(top-right corner of the home page). For plugins, click on 'Get Plugins'.
You'll need Bukkit. There are various plugins; I use PermissionsEx
Go on bukkit plugins and get a saving program that should help it and if it doesn't work re-install the server files.
Essentials Command: /reach (distance)