Blog every day. Average to Difficult (5-8). Harder than you think, but you could make it as simple as positing a picture a day, to as hard as writing a 2500 word post daily.
Have a Movie Month. Easy to Average (3-6). Do you have a list of movies you have always wanted to see? Or would you like to watch every Best Picture winning movie from the 1930s forward. You can do it as a challenge. Watch a movie a day, or a dah on the weekends, or 3 says a week, whatever works for you.
Read a book. Easy to Average (4-7). Like the Movie Month, read a book or books that you have always wanted to read. Have you it read a book in a while? Do it next month. Just carve out some daily time and read a chapter a day, 50 pages a day, or whatever it takes to get through your book(s).
Try fasting. Average to Difficult (5-8). Fasting is all the current rage. I recommend looking at Dr. Fung’s videos and books, but there are a lot of great fasting resources out there. Try it for 30 days. Try different types of fasting. It can and does work for some.
Run a 5k. Average to Difficult (4-8, depending on fitness level). This is a classic challenge and, truly, most people starting at average fitness can run a 5K with 30 days of training. If you dont exercise at all, you may need a little more time, but you can certainly get started or make it a 60 day challenge. Couch to 5K is a popular plan, and there are even apps for it.
Strength Training. (Average (5-7). Commit to a strength training regime for 30 days and see how you feel at the end of it. My guess is much better. Too make it easier buy some at home dumbbells so you dont even have to go to a gym, can do it in your living room. I can recommend the Bowflex SelectTech Dumbbells, but anything will work. Start getting big and bulky in 30 days!
Go to Church. Easy to Average (3-5). Go to or visit a church for a month. Try a new church or go to your own church if you stopped going.
Plan a trip to a Sacred Religious Site. Average to Difficult (5-8). Find an interesting sacred religious site somewhere in the world and plan a trip there. There are many, but here is a list of some of the most famous ones. Obviously, you dont have to go to the site within 30 days, just plan the trip. Make it a goal to have a designation selected and trip planned by the end of the month.
Get involved. Easy to Average (3-5). Dedicate yourself to getting more involved in your church or religious group. Join a small group. Lead a class. Go to a class. Reach out to your fellow members. Do something, anything to get more involved. Try it. You need only commit for 30 days and see how it goes.