Also determine the parts for the members who are now part of the band, and the genre. You will need about six to seven songs, and it's fine if you have more. This way, you can perform at clubs, pubs, or wherever you please without having to be bothered by a lack of repertoire or someone complaining that they've heard it all before. Before actually recording anything, you need to rehearse the songs you've made. Keep playing until you're perfect. No body can make mistakes. You all need to work on one accord.  Jam practice a lot. You must practice to know your instrument and to sync in more with your band. Watch the main guitarist or singer for cues and entrances/exits on your part(s).     Keep practicing throughout your rock band hobby or career. Although you may think, "Well I'm already in a band I don't need to practice anymore." Wrong. You must practice to get better with your crew/band and to discover new creative ways to extend your band's talents and music.

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Write a summary of the previous text in Vietnamese:
Nghĩ ra tên của ban nhạc. Sáng tác các bài hát. Tập luyện.