Strategy

choosing your server
if you are a team player, but also a good fighter, go to a server that has many players. If you are a lone wolf, go to a server without many peoples. be warned, large servers have the most friendly players and the most savages. If you are meeting someone, I suggest server eu2. I have been in that server so many times I know where every single ore is and where the best spots are.

finding a good spot to start.
When you first start out, you are a ghost. Unless you have the ghost trap glitch, you shouldn't click until you find a nice spot to stay. I recommend a place with many double ores (2 of the same ore that are right beside each other) or triple ores (3 of the same ore forming an L shape) If your meeting someone, go somewhere descriptive, like the top right corner.

leveling up
when you find your spot, start mining enough iron to make an iron pickaxe. As soon as you can, start making generators and sellers. Whenever you get $3500, start mining gold and make a gold pickaxe.

to be continued when i have more time