My first 3 cities I have built have been oil drilling/export cities and here are some tips. I'm sure all these would apply to ore/coal mining as well.
1) Try to hold off on expanding roads/zoning too fast because you want to get your oil drilling rig up ASAP, if you add all 10 drills in the right spot you can get 10k-13k barrels per day (it takes quite some time for the ramp up to do this as well).
2) Build your trade depots close to the highway so the trucks have an easier time getting on/off the highway to deliver the oil for maximum profit. At the same time try to keep your residential/commercial away from your trade depots and not close to the highway because it will cause massive traffic.
3) It takes 3 full fledged oil fields and 3 trade depots to hit the 160,000 profit mark to create your petroleum HQ so you can turn your oil into fuel/plastic.
4) Take your time with your city because Crime/Fire/Health issues can get out of control if you progress to fast due to moving truck traffic, never upgrade large regions all at once otherwise you will be in a gridlock.
5) From what I can tell, once you plop the trade HQ, petroleum division, etc you can power them off so you don't spend 400/month and you still get all the benefits. For example, I just added an incinerator to my gargabe dump but since the incinerator burns the garbage faster than it accumulates I can keep it off 90% of the time and just turn it on when my dump starts to get full. This saves me at least 2,000-3,000 per hour, I turn off all my departments of transportation/education/etc.
The city I made last night in a couple hours has 30k people, no traffic at all(buses really help here), I have almost a full built bus station, I get about 7,500 people riding the buses per day which is almost 25% of my population. I have 1.3mm simoleans right now and make 200k per day in oil, 10k/hour from my city, I am just stock piling the cash right now and planning out my city. Eventually my oil fields will run dry, but by that time I will be right around 20 million simoleans and will switch to importing oil and exporting plastic/fuel.
Last couple tips
1) Don't waste the 110k building a recycling center unless you have at least an elementary school because uneducated people don't recycle.
2) Traffic causes the most issues, my last two cities were less than 30k population and I had all sorts of fire/police/health issues because they couldn't get to the people. My current city has the very basic units and no issues at all, I have mostly health issues, but it is more because I am a fully industrial/oil drilling city so I would expect it to be at least less healthy in the beginning.