Fasting is the giving up of a regular appetite to invest into and feed your relationship with God. Practically, if you’re doing a food fast – then take the times that you would normally be eating and use them to pray, worship and read your Bible. For hobbies, social media and entertainment – it’s the same, instead of turning to these things – for the period of the fast use the time that you would normally be doing these things to seek God and invest into your walk with Him.