I was waiting what the best and most affordable way to improve my wifi signal I receive a decent signal and was wondering what would boost it to my devices?

A better router ?

Tin Foil Hat...
Or helpful newbie link ;)

Try this.
10 Ways to Boost Your Wi-Fi Signal | PCMag.com (http://www.pcmag.com/article2/0,2817,2372811,00.asp)

I have a Linksys booster, works great.