Philippians 4:6 reads, "...let your requests be made known unto God." Yes, the bible says, 'let your requests be made known to God,' but how do you do that?
Prayer. Prayer is mentioned many times throughout the bible. One is Timothy 2:8 which reads, "I desire therefore that the men pray everywhere, lifting up holy hands, without wrath and doubting." We are supposed to pray. Jesus Himself said, 'when you pray,' at least twice in the bible. Jesus didn't use the word 'if,' He used the word, 'when' (Matthew 6:5 & 6).