diff --git a/TODO.md b/TODO.md
index a7cf1ed..17e0f67 100644
--- a/TODO.md
+++ b/TODO.md
@@ -3,6 +3,9 @@
   * improve naming in perf.go in accordance with https://prometheus.io/docs/instrumenting/writing_exporters/#naming
   * ~~perf: export all disks ... currently only first disk is exported~~
   * ~~use help text to indicate underlying WMI metrics, rather than human-readable text~~
+  * perf: hardcode "_Total" for always exlusion
+  * perf: FreeMegabytes should be a ratio
+  * perf: dont export Avg* and *_Base values
 
 ## Roadmap
   * stabilize naming