Jetpack Joyride

It is much easier to obtain this achievement if you have the coin magnet gadget equipped. In addition to that if you have the Insta-Ball gadget equipped because it will bounce you along after you are dead. Another suggestion is to use a final blast when you are near a group of coins, boosting you to the coins, letting you collect them.

Also, you do not have to collect all of them in the same game; normally, you will get this achievement without trying.