FrankiesBack over at Trueachievements made an amazing spreadsheet that also compliments as a guide. You can find it here
TrueAchievements and at this current moment its the second place solution. The first solution, currently by vSully is also a very good and just more in depth version of the things FrankiesBack wrote in his. Here is his spreadsheet for download
https://docs.google.com/spreadsheets/d/18qUft3HNONdaW7nQJJ5W... Download your own copy and use it in good health! If it helps you at all, make sure you send him a thank you for his/her hard work! If you want some videos, here are two that are really helpful as well.
Video 1: (credit to UnitedGamer101)
Video 2: (credit to HarryNinetyFour)
Enjoy and good luck!