A few thoughts

Information - Encourage/require all coaches to use TeamSnap. Send email from the league with relevant dates for the entire season as early as possible. Email clear policy regarding weather-related changes.

Uniforms - Make them available well before games start. If possible, limit changes from year to year so that they are being purchased only if new to the club or if larger sizes are needed. Establish a trade-in or lost/found exchange so a kid that loses a jersey mid-season can get a replacement. If the league generates revenue from the uniforms, increase the registration fee rather than require new uniforms to be purchased each season.

Additional Fees - If the league charges fees for tournaments, field usage, etc. separately, be up front about those.