Nice advice by Gally.
I also would advocate looking at your list and seeing where the clear breaks are in scoring. If scoring is somewhat continuous, I usually equate 2 pts a game for a tier. So if a tier starts at 200 pts, I would go until I reach 168 points.
Here is an example from my "current" cheatsheet for WRs. (this obviously won't be the final one!) 1/2 PPR, 2 pts bonus per 100 yds rec, 1 pt per 10 yd receiving.
It's a clear break from AJ Green to Jordy. It's not so much from Tier 2 to Tier 3. I don't entirely trust Keenan Allen or DT, I felt that they should be at the top of my Tier 3. Since my Tier 3 is very deep, I probably will divide my 3rd tier into two buckets......consistent WR2-WR3- low upside guys like Landry and Tate, and WR1 upside receivers like DT, Hopkins and Watkins. In Tier 3, I strongly prefer to pick WR1 upside guys over consistent guys if I have the choice. Watkins could win your league for you.....Landry never will (at least not in a 1/2 PPR league).
It's best to have your tier be a list of similar players. Below I have a elite tier of 5, a solid-weak WR1 tier, and a very large WR2-WR3 tier.
Wide Receivers (ADP) Pts
Tier 1
1 Antonio Brown Pit/9 273
2 Odell Beckham Jr. NYG/8 270
3 Mike Evans TB/11 268
4 Julio Jones Atl/5 266
5 A.J. Green Cin/6 258
Tier 2
6 Jordy Nelson GB/8 231
7 T.Y. Hilton Ind/11 226
8 Michael Thomas NO/5 220
9 Amari Cooper Oak/10 212
10 Dez Bryant Dal/6 212
11 Allen Robinson Jac/8 206
12 Doug Baldwin Sea/6 204
Tier 3
13 Keenan Allen LAC/9 198
14 Demaryius Thomas Den/5 198
15 Tyreek Hill KC/10 197
16 DeAndre Hopkins Hou/7 196
17 Alshon Jeffery Phi/10 191
18 Jarvis Landry Mia/11 188
19 Brandin Cooks NE/9 186
20 Michael Crabtree Oak/10 186
21 Larry Fitzgerald Ari/8 185
22 Golden Tate Det/7 185
23 Sammy Watkins Buf/6 182
24 Emmanuel Sanders Den/5 181
25 Tyrell Williams LAC/9 176
26 Kelvin Benjamin Car/11 174
27 Stefon Diggs Min/9 174
28 Davante Adams GB/8 172
29 Willie Snead NO/5 171
30 Jamison Crowder Was/5 168
31 DeSean Jackson TB/11 168
32 Quincy Enunwa NYJ/11 167
