Guerrilla floristry: it's just a word for something that many of us do without thinking, but I kinda like it. So here you go, a nice little example of what you can do - without buying a thing. Glorious parrot tulips are the show stopper, granted, they were a gift, a mother's day bonus; if you like :-)
The rest? Lavender from the garden, olive branches from the footpath where someone had been pruning, privet berry and abutilon (or chinese lanterns) from a lane-way somewhere near me.