Moving into my first actual house that I own has been an amazing experience. I purchased a home that was in need of remodeling and was actually the worst house on the block. This allowed me to get into the nicest part of town for a very low price. Doing this was a great benefit financially due to the increase in value that the home is now worth, but I have also been needing more and more space to work due to the state of the home. I have realized that the garage is one of the most important areas because I need it to build and repair items when it gets cold. This means for half of the year I actually need to build in the garage. So I am planning on organizing it to the best of my abilities.
The first and most important thing to do is simply to move everything out of it. I know that sound like a terrible and long winded plan, but it is indeed the only way. The best way to reorganize is to start from scratch. It is also the only way to make additions. So move your cars out of the drive way and start working. Pull everything from bikes, tool, and brooms out of the garage and onto the driveway. Now that you have it all out, then you know all that you want to keep. Yes, this is the best time to get rid of unwanted items. There really is no point in keeping things that will simply take up space.
This is also the best time to pull out some packaging supplies and pack up the items you use infrequently. So take the items and put them in boxes that can either be stored on shelving or put in the attic. I do suggest putting items in the attic of a shed if you have one. It is so much nicer to have space to work than the convenience of getting one item once a year.
Now I suggest making any changes to the garage you would like. The most common change is to add or move shelving for storage. By being able to store items vertically you can save lots of space . Using the vertical space is generally the wisest move. If you are afraid of things falling, then grab your packaging supplies again and box up the items on top shelves. This keeps things safe and less of a chance for problems to occur.
Now that the garage is your open space, put the items back in an organized fashion. Be wise, take your time, and give yourself the room to work on cold days.