Sort:  

Either create something that others are passionate about such as many large brands (Disney, Nike etc..) or have a child. Also by inventing something new or innovating on something old but putting a new twist on it it may carry on even after you are gone. If you capture the hearts of the people with your goals and ambition it is easy to keep your legacy living. The only problem is later on it may not be what you imagined it to be, it could be better or or it could be worse depending on what the next person wants their legacy to be.

For most regular people the answer is to make sure it is on a decentralized blockchain. If you have great ideas, make sure you post it directly on the blockchain (Steem) and continue to develop it there,
If you can find any way to improve open blockchains do it.
It will be there much longer than your life span and your childrens

Coin Marketplace

STEEM 0.30
TRX 0.11
JST 0.034
BTC 66408.70
ETH 3225.39
USDT 1.00
SBD 4.17