How to put albums from my itunes to iPhone 4?

Hi, I'm not very good at technical things, so I've got an iPhone 4 and I put my music on itunes and sync'd it to my phone, since then I haven't tried to add more music or anything until now I just tried to put a new album on it and all these other albums that are on my icloud or something keeps going onto my itunes and I don't want them on my phone I only want to put one album on my phone but when i go to sync it itunes tries to sync everything.
How do I just put one album from my itunes onto my phone?

Connect your iPhone to the computer
Open iTunes
Click on your iPhone in the top-right area (just below the Search Library box)
Select the Summary tab
Check the box next to Manually manage music and videos
Then, hit the Done button in the top-right area (just below the Search Library box)
Select the songs you want and drag them to your iPhone

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