Somewhere else on this website, I detail the importance of a grinder when it comes to espresso. Many times when speaking to coffee aficionados, they will tell you that the grinder isn't as important if you're brewing filter drip, or press pot coffee, or vacuum brewed, or the like. I'm here to tell you that ain't true. The grinder is a crucial tool in the crafting of any coffee beverage. Don't skimp, don't let it fade away. And put away that store bought pre ground.
Coffee is a demanding thing. The bean is ready to offer you something that tastes completely out of this world, but only if you let it. Only if you use it right. The coffee grinder is your essential tool to doing this.
Many people skimp on the grinder. It's viewed as the boring afterthought. Or there's a mentality of "hey, who's crazy enough to spend $200 or more on a grinder when you can pick one up at Target for $15?". While this is true - you can get a grinder for $15, you have to also realise you get what you pay for. Often people will blow $150 or more on a coffee maker, $12, $15 or more per pound of quality coffee, then they get it ground at the shop they bought it from, or use a blade grinder (aka the whirleyblade or weedwacker grinder) to get the grounds needed to brew.
Stop the insanity. Please