Maintenance and coming soon mode

I just started a video sharing site using clipshare. Unfortunately clipshare does not come with the option to put the site on maintenance mode. 1) I want to put the site on maintenance mode, or coming soon notice. I prefer a solution easy to implement. 2) I want to be able to work on my site from home and any other location, using any laptop, tablet, or computer. 3) I want to be able to switch back and forth between maintenance mode and "regular" in the less painful way possible. Here is what I did so far. Perhaps there is a better way to do it. -Somebody helped me put a password on the site, but it didn't work well, as I was unable to see changes I made in clipshare' cpanel, published to the website. so I gave up on this solution. Perhaps it was not done right. -Right now, with some help, I did some change to my .htaccess, so I could work on my site, but only from home! Using one specific IP address. So, I can't work on my site in a library, a cafe or any other place. This solution does not let me see how my site looks like as seen from other devices. 4) I am open to any suggestion or improvement. This could be the beginning of a fruitful collaboration.