network conundrum

I have one Mac, that I use the majority of time, however I have a home network that is populated by Win7 machines used by my family members.
I have been unable to set up the network so that it is visible to me everytime I log on, like it is on the various Win7 machines. I have the 3 machines I most commonly exchange files with listed in my Go to Server module. Here's my conundrum. At some time on the weekend all of my network machines showed up in my Finder panes. I don't know how I managed it and now they're all gone again and I'd like to get it back, logging in and out of 'servers' is a pain. I want my Network to work as seemlessly as it does on my Win7 machines.