Not enough room to make a free-standing Christmas tree of books? If you'd got some room on a couple of book shelves try the design shown at right (shared by Natalie Dickerson via the Facebook ALA Think Tank group.)
Plan to attend these free webinars; all you need is your computer & speakers or headphones (no microphone needed.) If you attend a live webinar, it may be counted as a Category B continuing education activity towards renewing librarian certification.
Webinars with a ★ are the ones I think you'll find most useful.
To help you succeed at engaging teens at your library, take a look at 10 Questions to Ask about Your Teen Services at the YALSA blog of the Young Adult Library Services Association. Here are three examples of the questions you'll find there: