Many free plans are available that help people read through the Bible in a set given period of time. Some Bibles offer suggested reading plans in an appendix. Most of these plans will take a reader through the entire Bible in a year. A year is a nice duration because it works out to about 3 to 5 chapters per reading, or about 20 minutes a day.
There are a number of different ways to go through the Bible. It could be that your program starts on the first page of Genesis and ends on the last page of Revelation (the first and last books of the Bible). There are some that will read something from the New Testament and something from the Old. Or it could be more detailed, maybe something from the books of history, something from the wisdom books, a bit from the books of the prophets, then the gospels, epistles, and so-on. Or chronological by event or by when the book was authored.
There are many programs available on-line. Bibleyear.com will allows you do develop your own 1-year program, taking into consideration translation and the type of read through you'd like to do. It also has start dates on the 1st and 15th of every month. You might have software on your computer or an app on your phone that helps guide you through a regular reading. You can also find resources for reading plans on my resource page.
It's important to be reading and it's much easier to do it with a plan. If you've never done it before, make this the year that you read the entire Bible, or if you've read the Bible 40 times, it's time to make it 41 times.
I highly recommend a chronological reading so you can see the "big picture."