Day Rides - what do You take with??

As per Header.

What do you take with on a Day Ride, and basically "keep" on/with your Bike??

I have a tail pack that clips on/off easy peasy, i would like to pack stuff in that that I can just gab and go.

1) Tools?

2) Clothing (not what you wear), what extra, like rain suit/buff/etc etc?

3) Water

4) Stuff like smokes/cell/GPS (if needed), snacks, etc etc, thats pretty self explanatory

5) What about extra tubes/repair kit/tyre levers/puncture kit/etc etc?

6) Stuff like duct/insulation tape/glue/lappie/cable ties/Leatherman/etcetc??

THANKS!!

EDIT.......OK, here's my List, stuff I usually have on the Bike anyway, AND then additional Stuff I'd need according to the advise in here:

1) Leatherman.............................................got
2) Rain suit..................................................got
3) Cable Ties, Duct, Insulation Tape............got
4) Wallet/keys/cell/cash...............................got
5) Small tow rope, Super Glue....................got
6) Cloth, Masks, Pratley Steel.....................got
7) Std Tubes, 18 and 21, repair kit...............got
8) Small dishwasher.....................................NO
9) Tyre levers x 3..........................................NO
10) Black refuse bag.....................................NO
11) Tool(s) to remove axle(s).........................NO
12) Plastic Gloves for dirty hands.................NO
13) Wet Wipes...............................................NO
14) Water, +- 750m........................................got
15) Smokes, lighter, sanitiser >..................got
16)Thermos and Coffee.................................hopefully
17) Cell phone Cradle gadget........................on its way