HI
I'm an access newbie but backups are something I've had experience with.
First question to ask is how vital is your information
Second is how often does it change
THird question is the database used 24*7
If your data is vital then backups need to be often
every MOnday Full backuo
every tuesday, wednesday etc incremental backup
Every MOnday Weekly backup
Every month a monthly backup
If you keep three sets of storage and rotate them then the most you can lose is one day.
If the data changes constantly I'd schedule more full backups.
Lastly if you data is used 24/7 then you need a backup regime that handles open files.
http://www.easeus.com/ do some simple software
Symantec backupexec is one could argue the best.
Doing backups is great but not just because they are scheduled assume all is well.
Every month make a point of doing a trial restore to an alternate location - I've had clients who thought the backups were viable when they were not!!
Alternatively as has been suggested contact your IT dept and get them to add you data to thier backup regime
HTH
Ian