Good tools are the cornerstone of any self-respecting cyclist's garage, although there are so many tools on the market that it's hard to know which ones to go for. A good idea is to start with a simple, high quality kit from a respected name, like the Roll-Up Workshop by Park Tools.
This is a great starter toolkit for people who are new to bike mechanics or more experienced people who need a new set of essential tools. It includes 1.5-8mm allen keys, a cartridge bottom bracket tool, 8, 9, 10 and 11mm spanners, cable cutters, a chain tool, a crank puller, 13, 14, 15 and 16mm cone spanners, a Shimano lockring tool, a tyre patch kit, a gear cleaning brush, triple spoke keys, tyre levers, headset spanners, a pedal spanner and a chain whip.
The tools are housed in a roll-up holder that can be hung up, and the price represents a good saving on buying the tools separately.