Through his word, even if it for the smallest thing you can still communicate with God, all you have to do is raise your hands and the Lord will be there. Through dreams, it does not matter in the way you communicate with your god, It can be with astrologers, you are in gods hands, that happened to Nabucodosor, God spoke to him and a prophet had to come and tell him everything that God wanted. Through visions, God always has his ways to speak, like Moses and Paul; he always has his ways to get his word around. Through the Holy Spirit, God has his Spirit that speaks to us, it's like the wind, it blows from where ever it wants and it comes with a sensation of joy and of comfort. Through Angels, heaven and earth are filled with Angels and they are for you.