So far we have talked about hearing and singing Do, Re, Mi, Fa and So. Let's review what we learned.
Do (pronounced like "doh") is the most stable sound. All other pitches in the scale sound like they want to go back to do.
Re (pronounced like "ray") sounds as if it wants to go back to Do or up to Mi. It is the least stable sounding of the first three pitches.
Mi (pronounced like "me") is another stable sound. Mi has a weak pull back down to Do.
Fa (pronounced like "fah") is the most unstable of the first five pitches. It has a very strong pull down to Mi because of the half step between Mi and Fa.
So (pronounced like "Soh") is the second most stable pitch in the scale. Only Do is more stable sounding. It has a weak pull back to Do.
For a more complete review of Do, Re and Mi go to Hearing Do, Re, Mi Melodies.
To review Fa and So go to Hearing Fa and So.
La (pronounced like "lah") is is an active tone that desires to resolve down to So. It can also resolve up through Ti to Do.
Re and La do not have as much of a pull to resolve as Fa and Ti. This is because the half step between Fa and Mi makes for a stronger pull than the whole steps between Do and Re or So and La.
Ti (pronounced like "tee") is the last note in the scale before coming back to Do. It is also called the Leading Tone because it leads by half step back to Do. Ti is an active tone that moves very strongly up to Do.
In summary, the four most common resolutions are from Re to Do, Fa to Mi, La to So, and Ti to Do.