I've always had a weak pinky finger, which has bothered me quite often. Actually, it is too long to fit comfortably and properly on several occasions. However, I treated each case specifically with several tricks. Now, I feel that my pinky is almost always out of position, it is like a "dead" finger and, moreover, it feels uncomfortable even in extension, where, in general, I had no problem in extensions, specifically.
So, I would like some advice on both giving a more active role to my pinky, since, quite often I prefer changing position to, for instance, play a trill, than play it with my pinky, and also on making it more comfortable in cases were extension is needed, since it would be nice to be able to exploit at least the length of my fingers.