As all of you know, there are four types of resources available in “Domination: Earth”: Money, Supplies, Personnel and Unobtainium.
All resources, except for Unobtainium, appear in random locations within a 5-kilometre radius around you after every check-in (i.e. Capture Land).
Resource locations are shared between players, which means that any resource that you can see on the map is visible to all other players nearby as well, so you have to get the resource before someone else does.
The visibility radius for resources is 10km; anything further than that from you will not be displayed until you move closer.
There are two types of resources on the map: sources (also referred to as “stations”) and one-off items.
As you may suspect, one-off items (bearing the same icon as the resources appearing in “My Lands” and “Construct) disappear as soon as they are picked up by capturing land around them.
Resource stations (Oil Rigs, Recruitment Beacons, Supply Factories) are semi-permanent sources of income and will last for 7 days from the moment of appearing on the world map, so make sure you capture one as soon as you see it! 
As soon as you capture a station it will award you with a small amount of its resource, but then you can collect more from “My Lands” tab by pressing “Collect Resources” every hour.
But watch out for enemies: players who manage to capture a piece of land that has a higher level than yours will take over the resource station if it falls within their land’s radius. To get your station back you will need to either upgrade your land to a higher level than the opponent’s or destroy the opponent’s land (e.g. using an army).
Please note that players in an active alliance cannot take over each other’s resource stations and the first player to capture it will keep the station for the rest of its lifetime or until the alliance is terminated (in which case see previous paragraph!).
Here’s where and how to obtain each of the resources:
Read all on the forum