Someone posed the question to me about how we decide to keep the Sabbath holy and set apart from any other day of the week. This is the response I gave. I know it's probably not completely biblical, but please understand where I am coming from and make sure you read the last paragraph...Is there anything that specifically says that you have to hold Sabbath on a particular day of the week? It's really hard to stay focused on God throughout the entire day (no matter which day of the week it is) and not go do other stuff. One thing that I've found that helps me more than trying to devote the entire day of Sunday to prayer and worship is to spend about an hour each morning and half an hour each evening (plus random times throughout the day) in prayer or reading my Bible. (The church that I go to has a nifty little thing where you can listen to someone read the Bible aloud to you online, so I like to do that when I am getting ready for school in the mornings.)
I think that staying focused on God throughout the week is a lot more beneficial than just devoting one day a week to him. I've had a lot of personal issues with what most people refer to as "Sunday morning Christians" (but I prefer the term "plastic people", taken from the song by Casting Crowns) and spending a slightly shorter amount of time each day has helped me stay closer to God during the almost five years that I refused to go to church (at the church and the Christian school I used to go to, I was hurt by a lot of what people said and how they acted) than forcing myself to go to church and spend the entire day thinking about God.
I'm the kind of person whose mind keeps running and won't settle down, so a lot of the time (I've started doing this more on Sundays, but I also tend to do it when I'm walking to school or to the grocery store), I'll just start telling God what's on my mind. This includes venting if I need to vent (if I recall correctly, I was so frustrated with him a few weeks ago that I actually cussed him out...) and just being as honest as I can, no matter what that looks like.
If I tried to do the thing where I completely immersed myself in God and spending time with other Christians on Sundays for the entire day, I can see two possible outcomes, neither of which would be beneficial. First, a lot of the Christians I've known are incredibly fake, which makes me very uneasy and even more annoyed and angry about going to church. This would most certainly be counterproductive. The second scenario that I can see happening is similar to the feeling a lot of people get when they come home from a Christian camp. While they're at camp, they feel like they're really connected to God and all that, but it really burns out as time goes on and even within a few days.
Based on that, I really feel that it's a better choice (for me, at least) to spend a little bit of time per day focused solely on God and just keep talking to him periodically throughout the week rather than try to go to church, listen to worship music, spend time with other Christians, etc all day on Sundays. I think that it may be one of those decisions that you have to look and see what would work best for you. I know that's a slippery slope (and can lead to the idea of subjective truth), but spending all day of one day per week devoted solely to God may not be the best choice (or even possible) for some people, depending on their circumstances.
Regardless, it's best to worship God with your regular actions. He... should be more like a best friend who's always with you or a father than like a king or the president. It feels like a lot of Christians forget that God is also a friend and not just some high and mighty ruler that we should all bow down and worship.