Outside of that though, it falls to you to test that your jobs are in fact running correctly. This can be achieved by piping the cron command output to a file that you control for each one of your jobs.
00 01 * * * bash mycommand1.sh > /tmp/mycronjob.log 00 02 * * * bash mycommand2.sh > /tmp/mycronjob.log
And in the same vein, you can check that the crontab as a whole is being executed by creating a job right at the end of the cron list that runs every minute and pipes out its output to a file that you control:
*/1 * * * * echo "Success! $(date)" >> /tmp/cronwatch.log
Note that > means rewrite the target file every time, whilst >> means append to the end of the file (and create if not exist).
Related Link: https://help.ubuntu.com/community/CronHowto