After you are finished with your tools take a moment to quickly rinse off clumps of soil etc. This stops your tools from going blunt as well as giving them that brand new, just out of the shop look.
Once you have finished rinsing the tools give them a quick wipe with a rag soaked in linseed oil. This keeps them sharp and stops the tools rusting.
Dry Indoor Storage
Once you have given your tools a quick wipe do not let all these work go to waste by storing them in a wet place or outdoors. Keeping tools inside in a dry location literally doubles their lifespan. Off all the tips to follow make sure you take this one to heart.