Hi
Yes, you can dry parsley, it keeps very well. And your mint will dry as well.
Try Delia Smith's chocolate truffle recipe, a very luxurious Christmas present.
Haven't tried it yet, but would love to have a go at making up a Christmas cake mixture and baking it in mini tins and ice with person's name.

One thing I love doing is to dry lavender flowers, grind them up to powder and mix in with cornflour and a few drops of lavender oil to make your own dusting powder. Goes down well as a gift especially if you can find a pretty container in a charity shop.

If you've got the right herbs you could make bouquet garni. Muslin very cheap to buy and you can thread coloured cord around the top and loop it to hang over the saucepan handle.

Dry and grind chillis to powder for your own chilli powder.

Dry and grind citrus peel (pith scraped off) to make a very lovely citrus cake flavouring.

Another thing I keep meaning to have a go at is to replicate something I found at Lakeland, this is a mat for hot pans, it's like a small beanbag, filled with herbs and spices so the hot pans make the kitchen smell lovely.
Old fashioned but I've been drying lavender to make lavender bags, depends on how much time I've got as to how fancy they get.

have fun
Sue