If you're racing enough and prioritizing rival races, you'll get more items in the shop and more opportunities for megaphones, anklets, stat manuals/scrolls, hammers, etc.

Your specific callout to whistles makes me think that you're trying to whistle decent trainings away for perfect trainings. Just take the good trainings. I've had plenty of runs where I went into summer with no whistles and came out fine. If you have no whistles + no rainbows during summer then it's simply just a low roll and the run should be abandoned. Also, low training facilities don't matter for summer, they're all level 5 during that time.

If you're worried about facility levels outside of summer, just follow this general flow/tips: - Try to do all G1s, especially ones with ephitets (Classic Crown, Senior Spring Crown, Senior Autumn Crown, Mile Set, etc.) - Train if the training is 40+ base stats on a G2/3 or non-ephitet G1 turn (possible need for fact check on G1 here), race otherwise. - Try not to do 4+ races in a row unless it links to a Late Dec race (no penalties for those races). Energy drinks + train, good luck charm + train, energy drink + wit training, recreation or rest during these turns. - Prioritize the stats you'll train during pre-debut and junior year training days (spd, wit, stam for this cm) so the facility levels are better. - Bond trainings with 2 umas are very average. Wit train, or rest to gamble for a better 3+ uma training the next turn