Once you have logged into your wallet, click on the Send title.
Once you are on the payment screen, copy and paste in the Ripple address you want to send a payment to. If the address requires a destination tag, check the website you are on for your destination tag or if you are dealing with a person ask them what the destination tag should be.
When you input the Ripple address where you are going to send your payment to, the client will scan which IOUs are accepted by the recipient.
Choose which asset you wish to send and enter the amount and then click on Send.
You will be taken to a confirmation page. Click on Confirm after reviewing the transaction then wait 3-5 seconds and you should receive a success message in your client.