The most valuable thing I learned -
Don't give up, if you don't understand any part of SFI, ask!
Your sponsor, co-sponsor, your upline, a2a friends, the Forum or if all else fails, put in a support ticket!
SFI works, reading helps a lot, there is so much info, if you don't read, you won't understand it.
Also, very valuable - ADVERTISING - Duplicate what you're doing!