This is one of a few different ways to earn skill points quickly in this game. In my opinion though, although it can get a little bit mind numbing, I feel it is one of the quickest and most reliable ways to earn skill points as fast as possible.
Here is a video showing how I earn my skill points.
Essentially, this method revolves around chaining drifts together on the air strip found in the Outback region (North West of the map).
Before we begin, I have a few hints and tips that you may find useful.
First, and very importantly, it is worth saying right now that there is a limit to how many skill points you can unlock in one chain
! You can earn a maximum of 3 points (or stars) per chain. Each point is equivalent to 100,000 points, so you want to aim for about 300,000 points, bank the points and start again. I spent plenty of time achieving point scores of over 1,000,000 only to find that I was still only being awarded 3 points. So if you are just trying to beat your friends and have bragging rights over who has the highest score, by all means, knock yourself out, but it isn't really worth it if you want to unlock skill points quickly. So for this guide, I recommend we just stick with aiming for the standard 300,000 ;)
I recommend you get yourself a fast 4WD car. As you can see, I used a Nissan GT-R, but feel free to choose whatever you are comfortable with. The reasons I recommend 4WD is purely for the control it gives you whilst drifting, you are less likely to completely spin out/over-steer (potentially ruining your chain) and if you have to, it gets you going again really fast and up to speed again if you need to get your chain going again.
Just make sure that you have plenty of power running through those wheels to keep them spinning ;)
(You might notice that I left the traction control on, but that was because my GT-R has plenty of power to keep the wheels spinning, so I did not feel that I needed to turn it off.)
I also recommend that when you are driving down the runway, try to stick to the left hand side of it as much as possible as this is the flow of "traffic" for the drivatars/A.I. just like it is on the road.
You should also try to keep an eye on what is ahead of you and definitely keep an eye on your mini map for any drivatar icons on it to keep you alerted of what is ahead. There was a point in my video where you can see I was trying to get ahead of an A.I. car and nearly ended up losing my chain because I did not notice there was a car coming towards me (I got incredibly lucky as I only "traded paint" and did not lose my chain)
But essentially, I would aim to drive at roughly 100MPH whilst constantly zig-zagging down the runway, trying to get "ultimate" drifts as much as possible to maximise my points scored. it may be different for each kind of car, but I found that with my GT-R, once I had started my drifts, I could keep my "foot" to the floor at full throttle and the car would maintain a decent speed for drifting.
There are many perks under the skills section of the skill shop that can help make this process a little faster. For example, Skill legend increases your chain multiplier from 5 to 6 (from 10 to 12 during skill songs), Drift star increases drift scores by 10%, Radio star increases the frequency of skill songs etc. You'll be earning more XP from doing all of this too, so more free wheel spins too.
Just remember to be aware when skill songs are coming up, certain ones are longer than others, but they make a nice boost. Below is roughly what you want to be aiming for in terms of score to bank. But bear in mind, the game has to play catch up to all the drifts who have done, so I tend to go a bit overboard and end up scoring more than I need sometimes, but you will get a feel for when to stop.
Scores to aim for:
5x multiplier = 60,000 (60,000 x 5 = 300,000points)
6x multiplier (skill legend perk) = 50,000 (50,000 x 6 = 300,000points)
Skill song - 10x multiplier = 30,000 (30,000 x 10 = 300,000points) Skill song - 12x multiplier(skill legend perk) = 25,000 (25,000 x 12 = 300,000points)
Good luck, and happy drifting.