I'm sitting here in my office in Brainerd, looking out at a dreary, rainy day... wishing I was fishing. There are some die hards who will still go out on a day like this, but if you were to pick the day and didn't have a whole lot of 'em, it wouldn't be a ton of fun unless you were smoking the fish.
It's days like today where I like to take the time to organize my tackle, break down or set up some rods/reels, and clean up my boat. Having a clean, organized boat is something that I just have to have. Knowing where your tackle is and ready to fish is another habit I have adhered to over the years.
Wrap up your unused snells on a tackle organizer, like a Lindy Rigger. Organize your hooks and jigs so you can easily get to them when the fishing is fast and furious. If your boat is in a garage, it's probably a good time to vacuum and clean up your boat. A little water and vinegar is a great solution to get the water spots off.
Take advantage of a rainy day... It gets you in the mood for fishing.