How to improve this backup script? [closed]

Question

I wrote this backup script. I run rsync, tar and a dump of mysql. I'd like to add some features like email alert or some kind of statistic.

Here is the script:

#!/bin/sh

DATE=`date +%D-%T`
ORIGIN=/home/share/
DEST=/media/BACKUP/mercurio/
LOGFILE=log.txt
echo "=====Starting backup on $DATE =====" >> $LOGFILE
echo "==Start rsync" >> $LOGFILE 
rsync -arHu --delete --stats $ORIGIN $DEST/share >> $LOGFILE
wait
if [ $? -eq 0 ]
then
        echo "==rsync ok"  >> $LOGFILE
else
        echo "==rsync ko"   >> $LOGFILE
fi

echo "==Sart TAR" >> $LOGFILE
tar -czf $DEST`date +%y%m%d-%T`.tar.gz $ORIGIN
wait
if [ $? -eq 0 ]
then
        echo "==tar ok" >> $LOGFILE
else
        echo "==tar ko" >> $LOGFILE
fi
echo "==Start DUMP" >> $LOGFILE
mysqldump -u root -ptoor --all-databases > ${DEST}databases/`date +%Y%m%d-%k:%M`.sql
wait
if [$? -eq 0 ]
then
        echo "==dump ok" >> $LOGFILE
else 
        echo "==dump ko" >> $LOGFILE
fi
echo "=====End Bakcup=====" >> $LOGFILE