Add liquidity at https://uswap.me/#/liquidity/
See this article for information.
Go to https://uswap.me/ume
Select any pool you like. For example, USDT/TRX LP Pool.
Enter the amount of liquidity pool tokens you want to stake. You can use the "MAX" button to stake all your LP tokens.
Then click "Stake USDT/TRX LP".
The operation requires confirmation from your wallet. Please click “Accept” in the “Request Signature” pop-up window.
Then close the window.
Done. Now you can track your UME tokens. All farmed UME tokens that you can claim will be shown here on the "Pending Claim" box.