Today's tip: if you are working on a song and you have to go from your chest voice into your head voice ( over your break), try to sing the song the same way each time and "train" your vocal chords to deal with the break transition in the same way each time. Don't sing it one way one time, and then change to your head voice on another note the next time. The transition will become easier to deal with the more you practice it the same way. Hope this makes sense. Any questions, just ask.
(Don't forget to exercise every day. :) )