Just in case all else fails I thought that having backups would be a good idea - any pointers towards the right kind of software would be greatly appreciated. I'd prefer if I could copy my two partitions at different intervals, if at all possible!

Nothing easier than that: With Norton Save and Restore, not only can you make backups for different partitions at different intervals, you could go as far as creating backups of individual folders, too. (at yet another interval, if you so desire.)

In fact, for each planned backup, you can set an individual schedule. (And "schedule" is a lose term here, since the software can also triggers and run a backup every time you power down your PC, ior install a new software, etc.)

Really useful if you have one computer with lots iof different data that has different backup requirements, really.

This back up solutions is not complete and present many risk
in case of complexity to set up an plan the backup, what really need to be backed up, disaster recovery?

I found a really cheap solution developed by SafeComs it is a solutions inspired by the most reliable solutions used by the multinational company and adapted to the SMB market, here is the link to know more about it http://www.safecoms.com/sbox/overview.html .

Believe me it is the best and the cheapest i've seen as i used to work for EMC-Legato.