I told you here to avoid using any more dialog tags than you absolutely must. Here's another tip on how you can do that.
Often, your characters will be performing actions as they speak. For example:
"They can't have just disappeared," Jensen said. He peered at the dusty valley through his binoculars. "They're hiding out there someplace."
Having someone perform actions as they speak is natural and engaging—readers often have an easier time following dialog if they have a clear image of where the characters are and what they are doing while they speak. But having a character perform actions while they speak can serve another very useful purpose. Let's take another look at our previous example, but with the dialog tag removed:
"They can't have just disappeared." Jensen peered at the dusty valley through his binoculars. "They're hiding out there someplace."
See what just happened? Even though the text didn't explicitly state who was speaking, having Jensen perform an action in the middle of a line of dialog automatically implies that he was the one who spoke. This is one of the most useful tricks I know for avoiding dialog tags.
Look through your story for places where a dialog tag appears next to an action, and see if you can pare the text down to just the action. Sometimes you won't be able to—dialog tags can't always be avoided—but I bet you'll be able to cut out at least a few.
As you're looking for places where you can apply this trick, keep an eye out for the words "as [he/she/they/it] spoke." New writers often use these words when they don't need to. Example:
The king took the sword and touched it to the shoulders of the knight as he spoke. “I dub thee Sir Gloudin of the Knights of the Broken Branch.”
Now, with the words "as he spoke" removed:
The king took the sword and touched it to the shoulders of the knight. “I dub thee Sir Gloudin of the Knights of the Broken Branch.”
If you place the dialogue immediately after a related action, readers will automatically fill in that the two are simultaneous. Neat!