Bike Tools & Maintenance
If you get seriously into cycling you'll learn to appreciate regular maintenance and knowing about how to repair things. It's part of cycling and given the right equipment and environment it can become a really enjoyable and satisfying part of cycling. At the very least you'll need some bike specific chain lubrication and a decent multi-tool. After that you'll find yourself contemplating a track pump, some quality tool separates and maybe even a workstand. You may never want to leave the garage!