I've always used flowers to decorate my baking, a little buttercream, nuts, and fruit but mainly flowers. This gets a little trickier over the winter months (and a little pricier), so I've been collecting and slowly drying so that my cakes don't look as sad as the season.
Hydrangeas are the best to dry as they pretty much do it on their own (towards the end of their season that is) and if you time it right you can get so many different colour tones!
I hang bunches up side down, in a dark-ish area (my kitchen) for a couple of weeks then once they have dried out I pick the petals off and store in a jar.
If my garden had done its job this year (or if I'd worked a little harder) I'd also be; pressing Pansies and drying cornflowers.
Pressing flowers between tissue paper in books, is a treat, because I forget and find little surprises though out the year!
I'd love to hear some other drying methods, please share your secrets with me!