If you find on Friday that you have fallen behind, do the following:
1. Start reading from Friday’s reading ( Mark chapter 1 and Genesis 30.)
2. Take note of the chapters you have not yet read
3. Set a date when you intend to catch up these unread chapters/notes in the next week or two.
Optionally, you might find it useful to scan through the chapters you have missed, looking at the chapter titles for a brief overview of events, in order to understand where you are rejoining the narrative.
If you are only a couple of days behind, you may prefer to continue in sequence, and this is at your discretion. If you are more than 5 or 6 chapters behind, I’d suggest rejoining the group and catching up later.