I am not even sure it is possible to waste your worship, but a couple of things came to my mind in this vein. Think with me about a couple of things. In I Cor. 6:19-20, God's word to us is: "You are not your own, for you were bought with a price. So glorify God in your body." God made us and bought us for this. We were made to "glorify God in our bodies"; we were made to worship. In a way, we belong doubly to God because He both made us and bought us. For us to neglect full participation in private and public worship in our lives is to waste the worship God purposed in us. So, we can waste our opportunities for worship and grieve our Creator and Redeemer.
Another way that we waste our worship lives is when we are more caught up in being happy than being caught up in joy. Happy depends on "happeness" or our circumstances. Joy is deeply rooted in the Lord. We would avoid being tried, tempted, and even wounded, but unfortunately our walk with Christ is not about avoiding a wounded life, but a wasted life. We must never treasure life above Christ. Those are hard words. It is sometimes in our suffering that our worship is enhanced not only for us, but for those who see us go through it.
Remember Psalm 40:3 which basically says that when we keep singing the new song that has been put on our lips and in our hearts, many will SEE and fear and trust in the Lord. So, our song of worship is not wasted when others observe us going through trial and suffering, through the stuff of life and yet we keep singing the new song praising and glorifying His name. If we fail to keep singing in the midst of it all, we again, waste our worship. I am not saying we should want suffering, but we all know that we all do and will suffer. Our choice is to not waste our worship! May our God be truly glorified in our worship lives to where He is blessed and others are blessed also. mjm