Originally Posted by MusicManJ4

Also, as a side note, if you are experiencing cold weather, be sure to begin every session with a very careful warm up. Cold weather causes muscles to contract, so you need to warm up using flexibilities exercises, such a lip slurs. Start softly, lower end. Then warm up the tongue, slowly and easily. After that you can do whatever you want - practice pieces, concentrate of something specific, like extending the range upward, ect. But warm ups are important, especially in cold weather, which causes muscles to stiffen.