Hi Vikram!
Probably my 3 favourite ones are Crutches 4 (inserting sounds or introductory words), word linkage (#10) and Speaking like a King (#11). Every week I focus on a Crutch I don’t use too much, to avoid forgetting them. So what I do is to write in my agenda, on every page (day) of that week, for example (Crutch 8: modulation), and try to use that Crutch more. The following week I’d do the same with another one. The one I’m focusing on this week is #12, Smiling.
Which are your favourite ones?