OmG I have a ton of tree trimmings . Use tree trunk rounds to build a rustic garden pathway. Love this, possibly sell them in blocks measure out even for short paths and to cover the mulch under the flowers shrubs
Designing a Garden With Foliage: Outdoors: Home & Garden Television -- Colorful Succulents: A composition of various sedums creates the foundation of an eye-catching, multi-seasonal bed. River of Hens and Chicks .
Succulent tree trunk - instructions are not in English but the idea is pretty basic. Tree trunk + removal of some wood + soil, water & succulents = awesomeness in your garden! You could even hang this from a patio at eye height.