Where to Start
Pick one or two projects that you can start in the next month or so. For example, if you live in the suburbs, you might want to get a few laying hens to keep for eggs. You'll need to research how to raise chickens, find out your local laws to make sure it's legal, plan for a chicken coop and then buy or build one, and order baby chicks or buy older pullets or hens. That's enough to keep you plenty busy for an entire season.
If that seems like too much, start smaller. Have a fireplace? Consider putting in an insert for wood heat. Have a sunny windowsill? Grow some lettuce and herbs for salads and cooking. Have a nice-sized backyard? Put in raised beds and plant a veggie garden this season.
Once you've soaked up as much information as possible about how to homestead, you'll be itching to start planning your homestead, but you've got to get your priorities in order. There are many facets to homesteading: growing and preserving your own food, raising animals (or not), and producing your own energy are among the bigger goals that most aspiring homesteaders have.
You'll want to consider which of these is most important to you so you can focus your energies appropriately. For example, if energy sufficiency is at the top of your list, you might choose to convert a diesel car and begin running it on waste vegetable oil or outfit your suburban home with solar panels before even buying land. If you know your heart is with raising animals for meat and egg production, and you're okay living on-grid for a few years while you do that, this information is going to dictate your next steps.
Identify a Property
For many of us, finding that "place in the country" is a key part of homesteading. Buying land may have made it to the top of your list of priorities. If so, start looking. It can take time to find a good piece of land suitable for homesteading. Remember that you don't need 40 acres, or even 10, to have a homestead. Even a small acreage such as 2 or 4 acres can provide for a family. However, if you want to use the land as a woodlot (see energy sufficiency above), 20 to 40 acres may be more appropriate.
Plan the First Year
Planning your first year on your homestead, whether you're doing that in place, in the suburbs, or city. If you can look ahead to a move, whether it's a work in progress or still in fantasy land, that can help you move from dream to reality.