How to Show not Tell

Novice writers are always being given helpful advice about showing, not telling, which means trying to show something happening (>dynamism), rather than telling the reader that it has taken place (>dullness).  If you find this difficult to do, why not try depriving yourself of adjectives and adverbs, the usual tools of description, so that all that you are left with is pure action?  Have a go at introducing a character for the first time in this way, so that you are robbed of the possibility of telling us that she has red hair and green eyes, and instead have to think very hard about how you portray her in motion.  It can feel a little constraining first, but if it takes you to a slightly different place in your writing and helps you unknot the show/tell tangle, it might be worth a shot...