Always be aware of your surroundings
When traveling, you are likely to get carried away by the picturesque environment. As a result, you may just forget your valuables. So, ensure that you are aware of your environment so that you won't remember later that you do not have your belongings on you.
Keep your belongings in sight
Like they say, out of sight is out of mind. Hence, always keep your belongings in sight especially if it is a backpack. Always look out for it every minute to ensure that is still on you. This is not difficult to do.
Utilise luggage locks and safes
The space for locks and safes are not for jokes. So, make sure that you take advantage of it and lock your luggage. This will deter anyone who wants to attempt to steal.