From working in extremely small things myself, I can recommend a few things: 1. Write tests around everything you have the time to. 2. Communicate frequently.

From working in extremely small things myself, I can recommend a few things: 1. Write tests around everything you have the time to. 2. Communicate frequently. 3. Try to write things in vertical (shippable) slices. 4. Work in short iterations. 5. Keep what works, drop what doesn't Ultimately, the most important element to reap the benefits of 'agile' was #5.