Smart contracts have transformed the way organizations and individuals engage with blockchain technology, allowing for automated, trustless transactions that do not require intermediaries. As the use of smart contracts spreads exponentially across industries, expanding these applications becomes increasingly important. Traditional blockchain networks have intrinsic constraints in transaction throughput, storage capacity, and computing efficiency, which have previously prevented smart contract applications from reaching the performance levels required for widespread adoption. However, recent improvements in decentralized hosting infrastructure are opening up new opportunities for scaling beyond prior restrictions. This comprehensive tutorial delves into advanced strategies in blockchain and DWeb hosting architectures that address scalability issues, including sophisticated layer-2 solutions, sharding mechanisms, and cross-chain interoperability frameworks. When combined with specialized blockchain hosting services that optimize network resources, these techniques allow smart contract applications to handle significantly higher transaction volumes while preserving the security and decentralization principles that make blockchain technology valuable for enterprise deployments.