F1 2010

You don't have to race 133 races. Win 12 or 13 first races in a season and you will have an opportunity to sign new contract for another season. Sign it, then simulate practice/qualification sessions and disqualify yourself in races for rest of a season (it only takes 5 min or so for a race weekend). You can also "simulate" entire 7th season as it is last season and you don't have to sign another contract. This way you can cut the number of races you have to actually race to nice 78, maybe less.

First of all make sure you choose a 7 Seasons Career in your first interview. No worries if you have missed that selection. Once you're in the paddock you can go every time you want to the options screen and select "Start a New Career".

In the most ideal scenario you managed to get all other single player achievements done within your first three seasons. In that case you end up like me and many others having four seasons left to go.

Now the easiest and quickest way to go through your remaining seasons is by selecting the difficulty to Expert and just keep crashing in the first corner in every race. This way you don't have to finish every 20% race. You can also always skip to the race day by selecting the event info while you're in the car at the box, there's no need to do the practice and qualifying.

Don't worry about getting no contracts because of the dropped down reputation to all teams. Once you finished your crashing after Abu Dhabi you will always get two contracts from lower teams. Basically this method works for every scenario you're in. If you selected for example a 5 Seasons Career and managed to get all but this achievement done you can still always start freshly with it. You just have to crash through all 7 seasons in that case which just takes more time.