Some jokes

Please help me out and critique my jokes and help me make them better.
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Warning from bowling alley: We cause Fun & Laughter to happen!
Thank god you posted that warning cos I thought that's where dead people come from.

"Great minds have purposes, little minds have wishes." My mind has a gutter!

When life turns to nothingness... turn that nothingness into lemons and make yourself a glass of something I like to call lemonade.