Just use excel, or another spread sheet. You can set up something pretty simple in a few minutes where you just plug the info you want (like date, distance and time), and it can give you the total miles, a monthly total, average time per ride, average distance.
to set this up: open excel.
Column A is the date
Column B is the distance
Column C is time
Find a place for the total miles (I use D1 and D2... D2 has the formula =SUM(B:B) which tells excel to put the sum of everything in the B column into D2).
Then find a place for the monthly totals.
I use D3,E3, and F3 (month, distance, time respectively)
To put in to total distance, put =SUM(B2:B13) (or whatever the cell range is: you can put =SUM( then click and drag a range of cells instead)
Same for total time, except its =SUM(C2:C13).
and you're done. I've got a pic to help a little.
If you want more info, you can always add to your spreadsheet (like adding average distance, average speed, average time on bike, what type of ride it was). If you need help, there's plenty of online help for spreadsheets, and you can PM me, or ask here.