Please correct my sentences.

Writing <em>a</em> diary reminds me of the importance of writing letters. Because I use a personal computer and mobile phone every day, <em>there are</em> not many chances for me to write something by hand<s>writing</s> (or, "there are not many chances for me to practice my handwriting). <em>Sometimes, I</em> can’t remember some difficult Kanji and <em>I </em>make some spelling errors in English.

Using computers and mobile phones <s>make us</s> <em>is</em> convenient <em>for us</em> and widens our view<em>,</em> but depending deeply on them is not good for us.

Keep up the good work!