Freely admit I stole this lock stock and barrel from the Workflowy set of useful reference stuff but if anyone wants, here are a whole host of symbols etc to tuck into a reference corner for cutting and pasting as needed.
Dingbats
2700 ✀ ✁ ✃ ✄
✆ ✇
✎
2710 ✐ ✑ ✓
✕
✗ ✘ ✙ ✚ ✛ ✜
✞ ✟
2720 ✠ ✢ ✣ ✤ ✥ ✦ ✧
✩ ✪ ✫ ✬ ✭ ✮ ✯
2730 ✰ ✱ ✲
✵ ✶ ✷ ✸ ✹ ✺ ✻ ✼ ✽ ✾ ✿
2740 ❀ ❁ ❂ ❃ ❅ ❆
❈ ❉ ❊ ❋
❍
❏
2750 ❐ ❑ ❒
❖
❘ ❙ ❚ ❛ ❜ ❝ ❞ ❟
2760 ❠ ❡ ❢
❥ ❦ ❧ ❨ ❩ ❪ ❫ ❬ ❭ ❮ ❯
2770 ❰ ❱ ❲ ❳ ❴ ❵ ❶ ❷ ❸ ❹ ❺ ❻ ❼ ❽ ❾ ❿
2780 ➀ ➁ ➂ ➃ ➄ ➅ ➆ ➇ ➈ ➉ ➊ ➋ ➌ ➍ ➎ ➏
2790 ➐ ➑ ➒ ➓ ➔
➘ ➙ ➚ ➛ ➜ ➝ ➞ ➟
27A0 ➠ ➢ ➣ ➤ ➥ ➦ ➧ ➨ ➩ ➪ ➫ ➬ ➭ ➮ ➯
27B0 ➱ ➲ ➳ ➴ ➵ ➶ ➷ ➸ ➹ ➺ ➻ ➼ ➽ ➾
Box Drawing
2500 ─ ━ │ ┃ ┄ ┅ ┆ ┇ ┈ ┉ ┊ ┋ ┌ ┍ ┎ ┏
2510 ┐ ┑ ┒ ┓ └ ┕ ┖ ┗ ┘ ┙ ┚ ┛ ├ ┝ ┞ ┟
2520 ┠ ┡ ┢ ┣ ┤ ┥ ┦ ┧ ┨ ┩ ┪ ┫ ┬ ┭ ┮ ┯
2530 ┰ ┱ ┲ ┳ ┴ ┵ ┶ ┷ ┸ ┹ ┺ ┻ ┼ ┽ ┾ ┿
2540 ╀ ╁ ╂ ╃ ╄ ╅ ╆ ╇ ╈ ╉ ╊ ╋ ╌ ╍ ╎ ╏
2550 ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟
2560 ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ ╭ ╮ ╯
2570 ╰ ╱ ╲ ╳ ╴ ╵ ╶ ╷ ╸ ╹ ╺ ╻ ╼ ╽ ╾ ╿