Are these wireless connections that are being dropped? What model of router do you have today?
A general checklist
1) How many bars of service are you getting on your wireless devices? Does it get better when you move closer to the router? Or get better when you move around a wall or obstacle?
2) Was another wireless device recently set up nearby? You might not know this. Wireless runs on 11 channels. If someone started up a new wifi device near you on the same channel, you could be fighting over the spectrum. If your router has an Auto setting, use that. Otherwise, use trial and error and see if you get better results on a certain channel. You might actually have the best luck with channels 1 and 11. Many routers use a +/-2 channels plan, so many people tend to avoid the edges.
3) You can have problems with protocol types, but I don't think that's you...if it were, you wouldn't ever be connecting. However, if you know which version of the protocol your devices use (802.11 A/B/G/N/etc) see if it helps to restrict your router to just the single protocol. Doing this could get rid of excess traffic on protocols that your router is evaluating to see if it needs to come to you.
4) Monitor your router to see how many connections you have on it. It should go without saying, but make sure you're using a password and if you can, WPA2 security. I have my router tag a name onto all my regular devices so I can see at a glance if something new connects.
Dropped wireless connections could be due to excessive CPU usage on the router. One strategy to mitigate this is to narrow your own bands down and therefore to narrow the amount of traffic that your router is seeing; reduce the "noise" in the room. Less traffic = lower CPU usage = more connection reliability for you.
Best I can do generically.
