比较一下这两个句子的区别：
Making some benificial memory training and having a good sleep.
Make some benificial memory training and have a good sleep.
第一句,只有两个现在分词短语,并不构成整句,所以语法上是错的.第二句,有两个并列的谓语动词,虽然没有主语,但是这是祈使句的形式,语法上是正确的.
可能你想的情况是用现在分词短语作状语.那么你需要在后面有一个主句.例如：
Making some benificial memory training and having a good sleep (状语),one (主语) can make (谓语动词) oneself (宾语) smarter (宾语补足语).
现在分词短语也可以作主语：
Making some benificial memory training and having a good sleep (主语) can make (谓语动词) one (宾语) smarter (宾语补足语).
这两个句子和你原来的句子的最大区别,就是后面有完整的主谓结构.
最后看一下,这句话错在哪里：
Making some benificial memory training and having a good sleep,if lacking sleep will be very harm for your brain.
开头是两个分词短语,逗号后是if引导的条件状语从句.也就是说,这句话没有主句.