How long does it take Adderall to help?

I have been taking Adderall for about a week. I know that Adderall takes effect within an hour of taking it and I should see a difference in concentration/focus/energy immediately, but does it also build up in your system and help you to become more organized and "on top of things" over time? I am so scattered and feel so disorganized and overwhelmed in life...I can see an immediate effect but once it "wears off" at the end of the day..that's it..I am a scattered mess until my next dose. Will it eventually get into my system better and have a more long-term effect?