15)Use goto only if you want to simulate switch case. For everything else use other control structure ( while...wend, repeat...until, for...next, etc) 16)Don't use gosub. Use a function created with def instead. 17)If you won't use an array anymore, then clean the memory used by it. You can do this with pop, unshift or by assigning an empty array to that variable.(GC will do the magic)