Well, I'm ashamed to admit it but I only knew two of these tips properly - the text stuff and the blend scrolling - but have picked out the colour filtering to have a go right now. Chose something I'd invented to practise on after we did the still life kitchen/bucket fill class with you. So here it is with its colours filtered out - told it to do 40 because they offer hundreds and there clearly aren't. So I wondered how many you would allow if you weren't sure how many shades there were in the image? It's not really helpful to have every last shade, is it?
All your 10 in 10 classes are a really brainwave and easy to re-run for a reminder too. Good thinking there, maestro (maestress?)!