You really haven't given us much to go on.
1) Was this connection stable before and now it's a problem or is this first time setting up?
2) How far are you from the access point? Are there obstructions?
3) What access point/router are you connecting to? (Airport Extreme, DLink, etc)
4) What Wifi standard are you using (802.11g, 802.11n, 802.11b)
5) Do you have wireless phones in the house?
6) How strong is the Wifi signal you are connecting to?
7) Do you have access to the access point/router if needed? (change channel used for example)
8) Does the Wifi signal get lower before disconnecting?
9) Any messages in /Applications/Utilities/Console that apply to Wifi?
1) Was this connection stable before and now it's a problem or is this first time setting up?
2) How far are you from the access point? Are there obstructions?
3) What access point/router are you connecting to? (Airport Extreme, DLink, etc)
4) What Wifi standard are you using (802.11g, 802.11n, 802.11b)
5) Do you have wireless phones in the house?
6) How strong is the Wifi signal you are connecting to?
7) Do you have access to the access point/router if needed? (change channel used for example)
8) Does the Wifi signal get lower before disconnecting?
9) Any messages in /Applications/Utilities/Console that apply to Wifi?
