Do yourself a favor and search for every file that you created or modified in the last 30 days. Go through the list and think, truly digest, what would happen if you deleted these files right now and had to restore them from your last backup. I used to make bimonthly backups until I had to use them for a recovery and only then realized the sheer amount of work that goes into creating 2 weeks worth of data. Now I make one weekly and one monthly backup.