If you can’t come up with a synonym, similar word or phrase (Crutch 2), or express the same idea with different words (Crutch 6), the easiest and most effective Crutches are, in my opinion, crutches 1, 4 and 8-modulation.
About Crutch 4, there are many options: long or short sounds, different sounds or introductory words. The ones I use the most are:
– aaaa
– mmm
– sooo
– welll
– aaaand
These are 5 options, that you can make long or short. That gives you 10 different options. And I’m sure there are more 🙂