Definately listen to what everyone above you said, they've got good advice. Helped me out some too. When soloing, keep in mind that sometimes the most basic, easy-looking riff or "trick" will work best, it will really help give unity to your solos. Another thing is, learn when to use speed! Use speed to show feeling, intensity, tension, etc. And learn what to play fast. The last part is difficult, heck I'm still trying to get it right. Keep at it, and you'll see marked improvement.