There are few steps that you can perform to make the speed faster:
(a) Use the appropriate Wireless channel.
(b) Move router to a better location where the interference is least.
(c) Tweak the wireless card settings regards power management, QoS, throughput enhancement etc.
(d) Use wireless range extender antenna if you move a lot.
(e) Use AES instead of TKIP in encryption.
(f) Keep wireless card and router software latest.
(g) Run a regular anti spyware scan.
Here’s to Good Karma