I have a suggestion that doesn't involve quick fix solutions like pedals or picks. I've always believed that 90% of any player's tone comes from their approach, attitude and feel, rather than their gear .... Consider a player like Ritchie Blackmore; he probably wouldn't sound very different playing his Strat unplugged. I don't know if you have any cheap beaters or backup guitars around, but a good "Kung fu" trick would be to take all the wound strings off and play it like that for a month or two, starting with a good amount of playing unplugged. I'm not sure what style of music you normally play , or if you're willing to experiment and improvise, but I bet you'd definitely see improvement in your tone eventually. . .