I found some very useful information in this resource. Take care to read over the "blunders" as well. It's always a good idea to learn from others' mistakes. The teacher comments are also worth considering.
Twenty-six different strategies that you can use with your gifted students at various times and with various types of lessons. The best is the last one that reminds you to use some of these same strategies with All of your students.
Here is a very handy list of activities that will fit most any curriculum, activity, and age level. Though the article claims ten ideas, there are actually many more because each section has several different ideas, too.
You may find this list of traits helpful in your classes. I appreciate the "But" column, which includes some of the issues you may find with your gifted students. You may want to keep some of these in mind when planning lessons and considering strategies.
Take some time with this list of "don'ts" to remind yourself of some of the things you definitely don't want to do with your gifted students. Then, try some of the "dos" to make things go more smoothly for you and your gifted students.