By default, the "Recently Viewed Contact" list along the left-hand side of GoldMine only shows a handful of contacts. You can expand it to 99 items by performing the following;
1. Select Tools | Options | System tab
2. Under Navigation, increase the number of Recent Items Shown to 99
3. Okay your way back out, GoldMine may need to restart.
I find having this list as long as I can make it invaluable! It becomes, in a sense, a "hot" list of all the folks I've been talking to lately. I also find myself using the list more than actually Searching.