Q: How can I speed up combat in D&D 3.5e?
Bad homebrew answer: Here, use this custom super-fast combat system I made up just now in about ten minutes. I'm sure it will work great and speed up combat, even though I've never used it nor even seen anything like it and have no evidence it even works at all in practice.
Good homebrew answer: My group was also dissatisfied with combat speeds. We used these techniques/mechanisms/tools/homebrew to speed it up. Here's how it worked out for us in practice, and here's the specific benefits and drawbacks we experienced. Here's how I recommend applying it to your situation.