Need help to increase daily visitors to 500 from 2-300

Hello, Our web shop, which sells gadgets in Norway, is experiencing visitors in the area of 200 to, some few days, even 400 visitors. The usual number is 250. We want to change that, starting as fast as possible, to stabilize on 500 visitors each day. We are open to use every method necessary to achieve this but we do want paying customers - say, not garbage traffic from India. Mind you, we only ship to Norway. Please place weight on this. I also want an approximate timeframe for when we might expect to reach our goal. Details / Current Ideas: - We have a Facebook page with over 2000 fans but no Twitter page (on Twitter I can collaborate with you), so there are some potential here. -Finding really cheap and good PPC keywords to target might also be a good idea (on both Adwords and Facebook), but PPC shouldn't be a big piece of the pie on this project to complete our mission. - Using SEO and ranking should be a good idea (I have some keywords were I've already done a great amount of SEO, but all are not in the top 10). - Maybe create a Corporate Blog to attract more visitors? - Make actions based on Google Analytics that we have installed. As previously mentioned, I'm open to most methods! Looking forward to hearing your thoughts and your offer, and then start our work!