Write down the salvation message on a card and a personal message of your faith and give it to someone. You could say something when you give the card by explaining it or give an extra word of encouragement. If it’s someone begging for food, you could perhaps give it to them with an apple or a sandwich.
The card can be very helpful in explaining your faith, especially with remembering all the important aspects of it. After-all, Jesus did commission us to tell the world about Him.