I have been using Sage 100 for about a year... it's been a steep learning curve but I'm getting there. I am an office manager who make lots of entries in the GL but I also oversee the entries of two other bookkeepers who do the RA and AP. (Which is to say that it's not only my own errors I need to watch out for.) Bank Rec remains challenging for me.  My understanding of the mechanics of it and how the different journals interact with it is pretty good but I'd like a good checklist of strategies to use when it's out of balance.

For example: This month, every item on my bank statement corresponds with an item in my GL but Bank Rec still shows an out of balance amount. I know this means there's an error somewhere in my GL... possibly something that's in there that doesn't belong in this month.  I am floundering around searching for the error, ruling out possible sources, but I think there must be a more methodical way for me to approach this.  Any tips or resources would be greatly appreciated. (I was in balance at the end of last month.)