Running a league is more work than it looks. Most new commissioners learn the same lessons the hard way. Here is the short list.

Mistake 1: Vague Rules

Saying "we will figure it out as we go" sounds friendly. It is a disaster.

The first rules dispute will happen fast. Trade timing, sideboard rules, scheduling deadlines, what counts as a forfeit. If you do not write the rules down before the season starts, every dispute becomes a vote in the group chat. Some of those votes will go against your decision and you will lose authority.

Write the rules down. Pin them. When something comes up that the rules do not cover, decide it once and add it to the document.

Mistake 2: No Match Deadlines

If you do not enforce a deadline, half your matches will not get played until the night before standings update. Some will not get played at all.

Set a deadline for each round. If a match is not played by the deadline, declare a default or schedule a coin flip. Be willing to follow through. Players who know the deadlines are real will schedule on time.

Mistake 3: Not Tracking Card Pools

If your league does not lock in card pools, players will cheat. Maybe not maliciously. Someone will accidentally play a card they got from another draft. Someone will think they had four copies of a common when they actually had three.

Lock in the card pool. Use a tool that logs every pick, trade, and addition. Without that paper trail, every dispute turns into one player's word against another.

Mistake 4: Letting Drama Slide

Trade disputes, scheduling fights, accusations of stalling. Whatever the issue, address it the same week it happens. Do not let it sit.

Drama festers. A small disagreement in week two becomes a player quitting in week six if you ignore it. The commissioner's job is to be the neutral party. Make decisions, communicate them, and move on.

Mistake 5: Picking the Wrong Set

Some sets do not draft well over a long season. If your league is committing to multiple rounds of the same format, pick a set with depth. If you do not know which sets work, ask experienced limited players or check archetype tier lists before committing.

A bad set choice is a season-killer. By the second round players will be checked out.

Mistake 6: No Communication Between Rounds

Leagues live or die by engagement. If the only thing happening between rounds is silence, players will drift away.

Post weekly standings. Call out a notable match or upset. Recognize milestones (first win, first draft, first championship). Use a chat room or message board so the league has a heartbeat.

The leagues that last are the ones where the social layer is alive.

Mistake 7: Trying to Do Everything Manually

Spreadsheets and group chats are fine for week one. By week three you will be drowning. Standings, schedules, card pools, trades, ELO. None of this scales without a tool.

Pick a league management platform. There are several. The point is not which one you pick. The point is that you stop trying to do this with a spreadsheet.

The first season is always the hardest. By the third season you will have a system that runs itself, your players will know the rhythm, and you will not have to think about most of the things that ate your time the first time around. Draftalot exists because every one of these mistakes happened in my own league before I built something to fix it.