Edit your pro to play for the various teams when going for the following achievements:
Note that games will still count if you are playing clubs and your opponents quit out, or you play as "Any".
If you're losing badly in a career mode game then get your pro sent off to save wasting time, as you never know the computer might give your team a result if you're lucky! You will be banned for one game as a result - sim this game as it won't count towards your achievement obviously!
Also always get yourself sent off in friendlies as long as you're a highly enough rated player as you won't get dropped for this. These games too will also count towards the 500; I've heard from people that this achievement is glitched (although that may only be on the PS3), but it pinged for me at exactly 500.
Over the course of this you will have played between 65 and 70 hours on the park, if you are using the shortest timed games (4 minutes e/w), so you will also have collected:
Another suggestion would be to alter the position of your pro in the "virtual pro" area of the game's main menu between defender, midfielder and forward to get various accomplishments, making it quicker to receive:
The Rising Talent achievement in FIFA 11 worth 42 pointsComplete 100 Accomplishments with your Virtual Pro
Playing through the games legitimately will also at some point give you this achievement if you are reasonably good at the game:
The Good Week! achievement in FIFA 11 worth 23 pointsGet yourself selected in the Team of the Week in Career Mode