Other stash tricks (most of these are minimally useful at best):
1. Wishing Well/Mystic: Would you believe it, but I guess right almost 100% of the time if there is a stash there or not. Likewise Stash let's you better control yields from Ironmonger.
2. Hunting Party: Bottom deck a Stash. Copper, Silver, Gold, and Stash make a nice province and you can rest assured that you will never end up with a draw deck bereft of Hunting Parties.
3. Rebuild: Name province, toss your deck, shuffle up a new province next turn. This plays like Chancellor/Stash (just more slowly and you can't pound out duchies freely, maybe something like Monument/Rebuild would work here).
4. Inn: Buy an Inn, get a province next turn; card gainers like Remodel or University can let you place stashes just after you use up your draw for this turn.
5. Scrying pool: Bottom deck the Stashes so you can efficiently draw your deck and get the money to buy a province.
6. Adventurer with only stashes will work like a higher priced, less effective Chancellor. Buy a province with 4 stashes, play an adventurer, find at most one other treasure, shuffle the deck so you have stashes on bottom, discard deck, play 2 treasures. Draw hand of 2 or 3 stashes, shuffle deck and top deck other stashes.
7. Bottom deck Stashes in a Wandering Minstrel engine - this way the minstrel discards your green and you can draw just to the last useful treasure.
8. Stash at bottom works well for a lot of "draw your entire deck" setups. For instance, outpost turns get better if you have 4 Stashes at deck bottom no interfering with your combo chances in a 4 card hand.
9. A number of big cycling cards (like Catacombs, Envoy, Embassy, Storeroom, etc.) can make it quicker to hit reshuffle and setup provinces.
10. And of course, the slowest Chancellor replacement - Golem. Golems + 1 non-Golem action and Stashes give you a deck reset every Golem play. Scheme is obviously the best candidate here as you can top deck a Golem every turn and nab a province each turn. Golem/Stash can actually be used to pound out colonies with things like Golem/Herbalist, Mandarin, Courtyard, Count, etc. - top deck a gold & then add 4 stashes when you shuffle. Golem/Haven works best here, you can just haven copper and then hit the colony with 5 stashes on deck top; you can actually run two Havens as long as only one is in deck at any time (as added fun, late game you can swap to provinces by havening back a Golem each turn).