have your BOB (Bug Out Bag) set up and ready to go with the above mentioned items (food (MRE's), water, defense, shelter) Makes the escape faster (don't have to waste time packing) even if you stay in place you will now what you have and where it is at
I'm still building on my plan and supplies and am planning on a few different situations, If I need to bug out I already have several places to go, any where from 15 mins to 4 hours drive time and there are a lot of back roads I can take.
1) SHTF no warning (most likely a natural disaster, where I live, a tornado, would leave me with no vehicle) I have back packs for each person in the storm shelter, 3 days... food, water, first aid, matches, and blankets (have CCL so defense should be covered) should be enough to clear disaster area, or if unable to exit storm shelter do to debris, survive till help arrives.
2) little more warning, I have conversion van, already stocked with camping supplies (been to the lake a few times this year (good practice, go camping see what you need) just add food from the well stocked pantry, plus survival food (have several of those wise 60 serving bins with 25 year shelf life) and water purification filters, barter items (cigs, alcohol, extra tools, silver coins)
3) have to stay in place, I live just out side of a mid-sized city, and know my neighbors pretty good, most hunt and fish, we have river access, large open farm fields all sides, I think we could defend our sub-division pretty good, I have supplies to block off windows, but wood framed homes don't stop bullets or fire, have underground storm shelter, but could leave me trapped, so if it gets to bad may still have to leave.
this is not something I've worked on all at once, has taken years to reach this point and I still need to add more. The first step is deciding to be prepared