I have been thinking of putting together a sort of challenge for myself so that I learn new things. Basically I want to create a list of decorating techniques that I haven't tried before which would include sugarpaste, buttercream, royal icing ... I'm trying to come up with ideas but keep getting stuck. So far the only thing I can think of to try is Buttercream transfers. I was also thinking of using the challenge on my blog. I would be very grateful for suggestions that anybody would have or ideas on how to start this while thing. 

AI'm not familiar with your skills so its hard for me to offer suggestions.

Some things that come to mind are: brush embroidery, Lambeth method, piping lace

gumpaste figurines, flowers (that's a whole other set of challenges since each one is different), usin molds, embossing

sculpted cake,

AAustralian stringwork.