Both are possible.
Planned worship – Planned worship happens in many instances. For example, when you go to church there is often a scheduled start time and duration for praise and worship. This helps keep order. Planned worship is also mentioned in the bible: when the church in Corinth was not worshipping correctly, Paul wrote “When you come together, each one has a hymn, a lesson, a revelation, a tongue, or an interpretation. Let all things be done for building up.” (1 Corinthians 14:26). Planning your worship time could also help you keep to it – for example if you have a busy day but want to ensure that you do your daily quiet time faithfully. So you set 7am as the time to do your daily quiet time with the Lord. The fixed time may help you ensure that you are consistent in your praise & worship.
Spontaneous worship – Some churches partake in spontaneous worship. For example, Bethel church defines spontaneous worship on their blog as “fresh expressions of worship beyond the songs that have been pre-written, planned and practiced”. It is important to be open to the Holy Spirit and let Him move in our worship. We shouldn’t move with regime but with God’s Spirit instead. When we are open to spontaneity, we don’t let our minds keep us in a strict pattern. Instead, we let our hearts guide us as they pour out before God. A good way to transition into spontaneity during worship is to start singing in tongues, singing in scripture or singing your own words of praise and worship to the Lord.
