I often get asked this and my answer is always the same - get started.
I can talk for a long time (some say too long) about the benefits of sandbag training but the reason I got started was because the sandbag was easy for me to get hold of and very inexpensive. I simply purchased a 25kg/55lb bag of sand from a local hardware store for £1.50. I decided to try sandbag training and started sandbag training on the same day - no drawn out decision making process, no procrastination, no nonsense.
If you are thinking about giving sandbag training a go then you should just do it. Do you know what happens when you start thinking about improving your fitness and goal setting but then do nothing about it, telling yourself that you'll "do it tomorrow"? Your brain (and eventually your body) will start to make the association that fitness and goal setting = no action. Pretty soon you'll be incapable of doing anything.
This is also true of any process of change. Have you ever written a list of things that you have to do and then not started crossing things off that list straight away? It doesn't work. You need to build momentum early on and then, once you start to see results, you'll begin to get into a routine.
This is a post about sandbag training and there are literally hundreds of workouts to try on the blog so you shouldn't be short of ideas. But, it could also be a post about anything that you need to change and want to improve in your life. So get out there, do something positive and let me know how you get on.