diff --git a/TODO.md b/TODO.md
index cee1aa241..5bbe9f4fd 100644
--- a/TODO.md
+++ b/TODO.md
@@ -5,7 +5,13 @@
 - parser and code generator independent from `mrb_state` (picoruby?)
 - pattern matching (case/in syntax, array/hash patterns, guards, etc.)
 - iv/hash entry cache
+- method inline caching improvements (cache method lookup results)
 - more peephole optimization (if possible)
+- built-in profiler/benchmarking tools (memory, method calls, timing)
+- improved REPL (mirb) features (multi-line, syntax highlighting, completion)
+- configurable memory pools (per-object-type, memory-constrained devices)
+- suspend/resume VM state (serialize/deserialize for power cycling)
+- CMake build support (better IDE integration, standard C tooling)
 
 # Things to do (Things we need to consider)